Chemistry Questions

Q:

Soft drinks contain:

A) Oxalic acid B) Tartaric acid
C) Carbonic acid D) Citric acid
 
Answer & Explanation Answer: C) Carbonic acid

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Q:

Atomic number of which of the following elements is greater than that of Copper?

A) Iron B) Chromium
C) Zinc D) Manganese
 
Answer & Explanation Answer: C) Zinc

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Q:

Atomic number of an atom gives the number of which of the following ?

A) electrons B) protons
C) neutrons D) neutrons and protons
 
Answer & Explanation Answer: B) protons

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Q:

The modern periodic table consists of 18 groups and 7 periods. What is the atomic number of the element placed in the 3rd group and the 4th period?

A) 23 B) 21
C) 19 D) 11
 
Answer & Explanation Answer: B) 21

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Q:

The oceanic crust mainly consists of silica and __________.

A) magnesium B) iron
C) manganese D) sulphur
 
Answer & Explanation Answer: A) magnesium

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Q:

Heat is transmitted from higher temperature to lower temperature through the actual motion of the molecules in

A) Conduction B) Convection
C) Radiation D) Both conduction and convection
 
Answer & Explanation Answer: B) Convection

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Q:

Which of the following is a greenhouse gas or a gas which can deplete the ozone layer?

A) BBr3 B) NH3
C) CH2N2 D) CCl2F2
 
Answer & Explanation Answer: D) CCl2F2

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Q:

What is the base of the Octal Numeral System?

A) 8 B) 16
C) 32 D) 64
 
Answer & Explanation Answer: A) 8

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