Consider the following:
 1. Sodium
 2. Potassium
Which among the above plays vital role in restoring the body fluid?
[A] 1 only
[B] 2 only
[C] Both 1& 2
[D] Neither 1 nor 2

Why most of the aromatic hydrocarbons burn with a sooty flame?
[A] Because the carbon-hydrogen ratio in aromatic compounds is high
[B] Because of the presence of the strong carbon-carbon bonds
[C] Because, hydrocarbons are unsaturated
[D] Because the carbon-hydrogen ratio in aromatic compounds is low

What is the reason that despite being third most abundant element on the Earth’s surface and most abundant chemical substance in the universe, Hydrogen is not found as a gas in Earth’s atmosphere?
[A] It is very reactive and unstable gas
[B] It is so light that readily escapes earth’s gravity
[C] It is not found in free state in nature
[D] None of the above reasons

Chickpeas when soaked in water can swell up to three times their volume. The phenomenon involved in this is called _?
[A] Imbibition
[B] Osmosis
[C] Reverse Osmosis
[D] Diffusion

Which of the following is / are correct statements?
1. The carbon content in Cast iron is less than that in Pig Iron
2. Wrought iron has lower carbon content than both the Cast Iron and Pig Iron
Select the correct option from the codes given below:
[A] Only 1 is correct
[B] Only 2 is correct
[C] Both 1 & 2 are correct
[D] Neither 1 nor 2 is correct

Which of the following chemicals being used as major ingredients of Bakery Industry in India, are said to cause cancer?
 1. Potassium bromate
 2. Potassium iodate
 3. Potassium sulfate
 4. Potassium chromate
Select the correct option from codes given below:
[A] 1 & 2 Only
[B] 2 & 3 Only
[C] 3 & 4 Only
[D] 1 & 4 Only

Nerve agents are a class of:
[A] phosphorus-containing organic chemicals
[B] sulphur-containing organic chemicals
[C] osmium-containing organic compounds
[D] radon-containing organic compounds

As per the Mohs scale of mineral hardness, which of the following are soft metals?
 1. Gold
 2. Copper
 3. Diamond
 4. Thorium
Select the correct option from codes given below:
[A] 1 & 4 Only
[B] 1, 2 & 4 Only
[C] 2 & 4 Only
[D] 1, 2, 3 & 4

Consider the following pairs:
1. Strontium carbonate – Red fireworks
2. Barium chloride – Green fireworks
3. Copper chloride – Blue fireworks
4. Sodium nitrate – Yellow fireworks
 Which of the above are correct?
[A] 1 & 2 Only
[B] 2 & 3 Only
[C] 1, 2 & 3 Only
[D] 1, 2, 3 & 4

Which of the following chemicals is also known as "sweet oil of vitriol"?
[A] Diethyl ether
[B] Aluminium sulphate
[C] Sulphuric acid
[D] Iron(III) sulphate

Which of the following get corroded by open air due to oxidation?
1. Iron
2. Copper
3. Zinc
4. Aluminium
Select the correct option from the codes given below:
[A] Only 1 & 2
[B] Only 2 & 3
[C] Only 1, 2 & 3
[D] 1, 2, 3 & 4