UPPCS Chemistry PYQs.

1.Catalyst is the element which—

2.Which of the following elements is not a Noble gas?

3.Heaviest natural element is—

4.Which of the following is the most common element in the universe?

5.In all bio-compounds the most fundamental element is—

6.Which element forms maximum compounds?

7.Useful element in photography is—

8.Most abundant carbonic element found in nature is—

9.Which one of the following elements does not occur in a free state in nature?

10.Which one is a fundamental particle?

11.Which of the following particles has zero charge?

12.Which of the following is not a subatomic particle?

13.Which one of the following pairs constitutes particle antiparticle pair?

14.Smoke screen are used in warfare for the purpose of concealment and camouflage, smoke screens generally consists of fine particles of

15.Which one of the following pairs is correctly matched?

16.Atoms, which have same number of protons but different number of neutrons are called—

17.Neutron was discovered by—

18.Nucleus of atom are—

19.Which one of the following is a fundamental substance?

20.A sample of any of the following substances disappears after sometime when exposed to air like camphor, naphthalene or dry ice. This phenomenon is called—

21.Isotopes are atoms of a substance which has—

22.Atomic weight of heavy water is—

23.Heavy water is a type of—

24.Heavy water contains—

25.Change of water into vapour is called—

26.Order of the size of nucleus is following—

27.Mixture used by deep sea divers is—

28.Sodium vapour lamp is used because—

29.Indane gas is a mixture of—

30.Buckminster Fullerene is ____

31.With reference to radioactivity, which of the following statements is/are correct?

1. Radioactivity is a nuclear property.

2. Hydrogen bomb is prepared on the principle of nuclear fission.

32.The age of the earth is calculated by which of the following method?

33.Radioactive dating is a process by which–

34.Consider the following assertion and reason and select the correct answer from the code given below:

Assertion (A): Ozone kills microorganism in water.

Reason (R): Ozone is not radioactive.

Code:

1.Average pH value of milk is—

2.Which of these is not a colloid?

3.Milk is an example of—

4.Both temporary and permanent hardness of water can be removed by—

5.Hypo solution is aqueous solution of—

6.After cutting cucumber if salt is added, then water comes out, it is due to–

7.The process used for transforming salty water into pure water is called

1.Which one is called ‘laughing gas’?

2.Gas used as slow anaesthesia in hospitals is—

3.‘Laughing gas’ is—

4.Which is known as laughing gas?

5.Smog is caused by presence of—

6.Which one of the following is incorrect?

7.Dry ice is—

8.Which pollutant affects bloodstream leading to death?

9.Which gas is both useful and harmful?

10.Match List-I with List-II and select the correct answer using the codes given below the lists:

List-I

A. Artificial fruits Ripening

B. Baking soda

C. Soft drink

D. Quartz

List-II

1. Carbon dioxide

2. Sodium silicate

3. Ethylene

4. Sodium bicarbonate

11.Match List I with List II and select the correct answer from the code given below:

List-I

A. Skin cancer

B. Sound pollution

C. Global warming

D. Ozone hole

List-II

1. Chlorofluorocarbon

2. Ultraviolet rays

3. Decibel

4. Carbon dioxide

12.The gas used in manufacture of vanaspati ghee is—

13.One mole of hydrogen gas burns in excess oxygen to give 290 kJ of heat. What is the amount of heat produced when 4g of hydrogen gas is burnt under the same conditions?

14.The chief source of hydrogen sulphide pollutant is:

15.The gas used to inflate aircraft tyres is—

16.Which gas has maximum percentage in atmosphere?

17.Which gas is used in Cryo-Bank?

18.Which catalyst is used in hydrogenation of vegetable oils?

19.A pungent smell near urinals is due to—

20.Easily soluble in water is—

21.Water pollution in river is measured by dissolved—

22.Which noble gas is not found in air?

23.Gas used in discharge tubes for decoration is—

24.Gases used for divers are—

25.Who among the following invented “Bio Gas” system?

26.Recently a chemical weapon was used in the civil war of Syria. What is that chemical agent?

27.The compound responsible for Bhopal gas tragedy was–

1.Purest form of carbon is—

2.Match list–I with list–II and select the correct answer using the code given below the lists:

List–I

A. Diamond

B. Marble

C. Sand

D. Ruby Blue

List–II

1. Calcium

2. Silicon

3. Aluminium

4. Carbon

3.Match List I with List II and select the correct answer from the code given below:

List-I

A. Silicon carbide

B. Carbon filament

C. Carbon dioxide

D. Dichloro-difluoromethane

List-II

1. Photosynthesis

2. Coolant

3. Artificial diamond

4. Aeroplane

4.Consider the following statements and choose the correct answer by using the codes given below:

1. The presence of calcium sulphate turns water hard and makes it useless

2. Diamond is more rigid than copper and iron.

3. Oxygen is main component of air.

4. Nitrogen is used to manufacture Vanaspati ghee.

Code:

5.Thermodynamically most stable form of carbon is—

6.Lead pencil contains—

7.Lead of pencil is—

8.Which is not an allotrope of carbon?

9.Graphene is—

10.Which does not contain carbon?

11.The carbon content is maximum in—

12.Which one of the following is made up of carbon only?

13.Match List I with List II and select the correct answer from the code given below:

List-I

A. Acetone

B. Carbon tetra chloride

C. Hydrogen peroxide

D. Liquid ammonia

List-II

1. Fire extinguisher

2. Nail polish remover

3. Dressing of wounds

4. Coolant

14.Which pair among the following is incorrectly matched?

1.Chemical used for preservation of eatables is—

2.Substance used in food preservation is—

3.Which is used for preservation of fruit juice?

4.Metal reacting instantly with water is—

5.Yellow street lamps use—

6.Colour produced by sodium chromate is—

7.Substance used in photography and as antichlor is—

8.Baking soda is—

9.Match List I with List II and select the correct answer using the code given below:

List-I

A. Washing Soda

B. Caustic Soda

C. Blue vitriol

D. Hypo

List-II

1. Sodium Hydroxide

2. Copper Sulphate

3. Sodium Thiosulphate

4. Sodium Carbonate

Code:

10.The substance used for artificial rain is—

11.Which one of the following silver salt is used for artificial rain?

12.Which one of the following is coated on the photographic plate?

13.Which one of the following is incorrectly matched?

14.Which one of the following is incorrectly matched? (Substance – Use)

15.Which one of the following substances is used in glazing the pottery?

16.The street ‘Kalaiwala’ gives shining appearance by rubbing a shining silvery material. What is this material made up of?

17.Which of the following compound is called ‘Chinese White’?

18.Which one of the following is used as rat poison?

19.Which one of the following materials contains calcium?

20.Which of the following pair is incorrectly matched?

21.Which chemical substance is found in bleaching powder?

22.Due to rusting, the weight of iron—

23.Consider the following statements and select the correct answer from the codes given below.

Assertion (A): When iron objects are kept open, they turn into brown powder (rust).

Reason (R): Rust is formed due to tannin.

24.Which one of the following salts should not be used as dining table salt?

25.Which metal is NOT stored in oil?

26.Which one of the following compounds is used to make fireproof clothing?

27.The blood pressure of an individual is 140 mmHg. In this statement ‘Hg’ refers to—

28.Which one of the following metals is accessed in native state?

29.Which one of the following is the hardest metal?

30.The costliest metal of the world discovered recently is__

31.Aluminium phosphide is used in the form of __

32.Which of the following is not matched?

33.Which food additive was banned by Government of India in June 2016 because the study reports revealed that its presence causes cancer?

1.Bauxite is the ore of—

1.The main constituents of Liquid Petroleum Gas (LPG) are—

2.What is main component of Liquefied Petroleum Gas (LPG)?

3.Which is a byproduct of petroleum refining?

4.Which among the following substance is called ‘Liquid Gold’?

5.Which of the following gas, released from biogas plant is used as fuel gas?

6.Biogas mainly consist of—

7.Gas mainly responsible for explosion in coal mines is—

8.Which of the following is the main component of the natural gas?

9.C.N.G. is—

10.Which of the following is fossil fuel?

11.Which among the following fossil fuels is cleanest?

12.Carbon is found in which of the following?

13.Storage of sodium metal is done in—

14.Which one of the following is the main constituent of LPG?

15.The smell due to leakage from LPG cylinder is because of—

16.Which one of the following fuels causes minimum environmental pollution?

17.Which one of the following energy source is not a commercial source?

18.Which of the following is the procedure in a biogas plant?

19.Diesel used in heavy vehicles for—

20.CNG used in automobiles mainly consist of—

21.Gasohol is a mixture of—

22.Which form of fuel does not produce pollution?

23.Cetane number is used as a quality parameter for—

24.Octane number is a measure of the quality of—

25.To avoid ‘knocking’ of the engine of a car, which one of the following is used as an anti-knocking agent?

26.Tetraethyl lead (TEL) is added to petrol:

27.Match List I with List II and select the correct answer from the code given below:

List-I

1.Helium is preferred over hydrogen in balloons because—

2.Which of the following is used for the production of explosive?

3.Which of the following was used during First World War?

4.Which one of the following is not an explosive?

5.Which of the following statement is correct?

6.The main constituents of gun powder are—

7.Which explosive is known as ‘Nobel Oil’?

8.Which one of the following explosives does not contain nitroglycerine as an essential constituent?

9.Match List-I with List-II and select the correct answer from the codes given below the lists:

List-I

A. Kevlar

B. Taxol

C. Zinc Phosphide

D. Nitrocellulose

List-II

1. Explosive

2. Synthetic fiber

3. Anticancer drug

4. Rodenticide

1.Polymer of natural rubber is—

2.Which one of the following is not a natural polymer?

3.Which one of the following is a natural polymer?

4.Which one of the following polymers is widely used for making bullet proof material?

5.Which one of the following polymer is used in making bullet-proof vests?

6.A polymer used for making nonstick coating for utensils is—

7.Which of the following polymers are used to make bullet-proof substance?

1. Kevlar

2. Glyptol

3. Lexan

8.Which of the following polymers is biodegradable polymer?

9.Bisphenol A (BPA) is a structural/key component in manufacture of which plastics?

10.Polythene bags cannot be destroyed because they are made of—

11.Which of the following polymer cannot biodegrade?

12.Which of the following is not a polymer?

13.Phenol is used in the manufacture of—

14.Teflon is a polymer containing—

15.Which one of the following is NOT correctly matched?

16.Arrange the following substances in chronological order of their first synthesis in lab:

1. Black gold

2. Fullerene

3. Graphene

4. Kevlar

17.Which one of the following pair is incorrectly matched?

1.Brass is a mixture of—

2.Brass is alloy of—

3.German silver is an alloy of—

4.Bronze is an alloy of—

5.Bronze is an alloy of copper and—

6.Which metal is essential component in brass, bronze and German silver?

7.The important metal used with iron to produce stainless steel is—

8.Steel is further processed to obtain stainless steel by adding which element is not used?

9.Stainless steel is an alloy in which following is added along with iron?

10.Which one of the following alloys is called an amalgam?

11.Materials used as solder in electronics are—

12.Percentage of silver in German silver is—

13.Which one of the following is main component of cement?

14.Which form of nitrogen is available in urea?

15.Percentage (%) of nitrogen in urea is—

16.Match List-I with List-II and select the correct answer from the code given below:

List-I

A. Morphine

B. Sodium

C. Boric Acid

D. German Silver

List-II

1. Antiseptic

2. Alloy

3. Analgesic

4. Kerosene oil

17.Organic foods are considered to be better for us because they are–

1.Which acid is present in sour milk products?

2.Match list–I with list–II and select the correct answer using the code given below the lists:

List–I

A. Sour milk

B. Vinegar and pickle

C. Soda water and other cold drinks

D. Apple

List–II

1. Malic acid

2. Carbonic acid

3. Acetic acid

4. Lactic acid

Codes:

3.Which one of the following acids is present in sour milk products?

4.Match list–I with list–II and select the correct answer using the code given below the lists:

List–I

A. Lactic acid

B. Acetic acid

C. Citric acid

D. Butyric acid

List–II

1. Lemon

2. Rancid butter

3. Milk

4. Vinegar

Codes:

5.Match list–I with list–II and select the correct answer using the code given below the lists:

List–I

A. Acetic acid

B. Citric acid

C. Lactic acid

D. Formic acid

List–II

1. Sting of ant

2. Curdling of milk

3. Vinegar

4. Orange

6.Which of the following is incorrectly matched?

7.Milk kept in open turns sour after some time due to

8.Match List–I with List–II and select correct answer from the code given below:

List–I

A. Acid present in Vinegar

B. Souring of milk

C. Compound present in bones

D. Acid present in Gastric juices

List–II

1. Calcium Phosphate

2. Hydrochloric acid

3. Acetic acid

4. Lactic acid

9.Acid used in baking powder is—

10.Sufficient quantity of organic acid found in grapes is__

11.Which one of the following organic acids is abundant in grapes, tamarind and banana?

12.Which of the following compound is called gammexane?

13.The main pollutant in smoke from cigarette is—

14.The main pollutant in the smoke coming from cigarette is

15.Which one of the following is also known as ‘wood spirit’?

16.Molasses is the best raw material for__

17.Which of the following compounds is used as a sedative?

18.Goldsmiths use aqua regia, which is prepared by mixing—

19.Which acid is used in photography?

20.Which one of the following pairs is incorrectly matched?

21.Bee sting causes severe pain and burning sensation due to the presence of:

22.Which one of the following acid is present in Apple Fruit?

23.Vinegar is an aqueous solution of which one of the following?

24.Substances used as an anesthetic are–

1. Chloroform

2. Nitrous oxide

3. Helium

4. Carbon dioxide

Select the correct answer by using code given below:

25.Which one is used for preservation in food process?

26.Charcoal used to make raw sugar colourless is–

1.Assertion (A): Detergents easily removes oil and dirt from garments.

Reason (R): Detergents increases the surface tension of water.

2.The raw material used to produce glass are—

3.Which type of glass can cut off ultraviolet rays?

4.Which imparts deep blue colour to glass?

5.Which of the following types of glass can cut off ultraviolet rays?

6.Which of the following imparts deep blue color to glass?

7.What happens when some charge is placed on a soap bubble?

1.Which is a constituent of natural silk?

2.Which element is used to produce matchstick?

3.Which is used to manufacture matchstick?

4.Which element glows in dark?

5.What percentage of phosphorus (P₂O₅) and Nitrogen (N) is present in DAP?

6.Bones glow in dark due to __

1.Which of the following supports fruit ripening?

2.Fruits stored in a cold chamber exhibit longer storage life, because–

3.Which one of the following chemicals helps in fruit ripening?

4.Given Assertion (A) and Reason (R), select correct answer:

5.Which nutrient enhances oil content in mustard?

6.Blue vitriol is used as a—

7.R.D.X. was invented by—

8.Main component of cotton is—

9.Which one of the following is used as antifreeze for automobile engines?

10.Tulsi plant has medicinal values due to presence of—

11.Tulsi plant has medicinal values due to the presence of the following:

12.Which one of the following materials is strongest?

13.Which of the following is NOT an antacid?

14.A powerful eye irritant in the smoke is:

15.Refrigeration helps in food preservation by

16.By which of the following the tape of tape-record is polished?

17.The powder used for developing finger prints on a multi-coloured surface is

18.‘Red ink’ is prepared from–