Chemistry

1 / 20

Which two elements are combined to form candles?

[A] Paraffin Wax and Stearic Acid
[B] Bees Wax and Stearic Acid
[C] Higher Fat Acids and Stearic Acid
[D] Bees Wax and Paraffin Wax

2 / 20

Due to which of the following acids, Milk tastes sour when kept in the open for sometime?

[A] Lactic Acid
[B] Citric Acid
[C] Acetic Acid
[D] Carbonic Acid

3 / 20

Which of the following will replace hydrogen from acids to form salts?

[A] Na
[B] S
[C] Ag
[D] P

4 / 20

Prafulla Chandra Ray, who is known as father of chemical science in India, was founder of India’s first pharmaceutical company. What is name of that company?

[A] Hindustan Pharmaceuticals
[B] Orchid Chemicals & Pharmaceuticals
[C] Indian Drugs and Pharmaceuticals
[D] Bengal Chemicals and Pharmaceuticals

5 / 20

Which of the following gases were called Fixed Air by Scottish physician Joseph Black which is discovered in 1750s?

[A] Oxygen
[B] Carbon Dioxide
[C] Methane
[D] Nitric Oxide

6 / 20

What is used as a sowing agent in the preparation of soft drinks?

[A] Phosphorus acid
[B] Boric acid
[C] Phosphoric acid
[D] Benzoic Acid

7 / 20

Which of the following scientists is known for using electrolysis to isolate and discover many elements?

[A] Humphry Davy
[B] James Burrow
[C] John Pringle
[D] Davies Gilbert

8 / 20

Which of the following gases is heavier than oxygen?

[A] Ammonia
[B] Methane
[C] Helium
[D] Carbon dioxide

9 / 20

Which of these metals is most commonly used as control rods in the nuclear reactors?

[A] Platinum
[B] Cadmium
[C] Cobalt
[D] Silver

10 / 20

Which metal is used in the Galvanization process?

[A] Tin
[B] Lead
[C] Zinc
[D] Copper

11 / 20

Which of the following metals is commonly used to increase the strength of steel alloys?

[A] Bismuth
[B] Boron
[C] Tin
[D] Molybdenum

12 / 20

Which of these fuels is a hydrocarbon or mixture of hydrocarbons?

[A] LPG
[B] CNG
[C] Petrol
[D] All of the above

13 / 20

Which of the following acts as anode in a mercury cell?

[A] paste of HgO and carbon
[B] None of the above
[C] Copper and iron rod
[D] zinc – mercury amalgam

14 / 20

Choose the correct statement about d-block elements:

[A] These are the elements of Group 3 to 10
[B] All of them are metals
[C] Both a and b
[D] None

15 / 20

What of these is the chemical formula of Rust?

[A] Fe2O3. nH2O
[B] Fe2Cl3. nH2O
[C] FeCO2. nH2O
[D] FeO. nH2O

16 / 20

What is the total number of allowed orbitals in a shell, if principal quantum number is n?

[A] n
[B] 2n
[C] n2
[D] n3

17 / 20

What is the relation between mass and wavelength of any matter, as per de Broglie’s relation?

[A] Both are directly proportional
[B] Both are inversely proportional
[C] Both are independent of each other
[D] wavelength is twice the square of the mass

18 / 20

Which of the following is also known as Alumina?

[A] AlO2
[B] Al2O3
[C] Al2O4
[D] Al2CO2

19 / 20

Which among the following is Quick Silver?

[A] Aluminium
[B] Mercury
[C] Lead
[D] Zinc

20 / 20

Which among the following is known as Quick Lime?

[A] CaO
[B] CaCO2
[C] Ca(OH)2
[D] CaCl2

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