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 Chemistry Questions

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Q:

Which is the only non-metal placed at the left side of the Modern Periodic Table?

A) Hydrogen B) Carbon
C) Neon D) Helium
 
Answer & Explanation Answer: A) Hydrogen

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Exam Prep: CAT , Bank Exams , AIEEE

1 1925
Q:

________ is used for making vinegar.

A) Tartaric acid B) Malic acid
C) Oxalic acid D) Acetic acid
 
Answer & Explanation Answer: D) Acetic acid

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1 1921
Q:

Which of the following is not a semiconductor?

A) CdS B) NaCl
C) Si D) Ge
 
Answer & Explanation Answer: B) NaCl

Explanation:

Semiconductors are those materials that are neither good conductors nor the good insulators of heat and electricity. Silicon (Si), Germanium (Ge) and Cadmium Sulphide (CdS) are semiconductors which work as conductors in some special conditions only.

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2 1918
Q:

______ decreases the rate of setting of cement.

A) Alumina B) Silica
C) Gypsum D) Magnesium oxide
 
Answer & Explanation Answer: C) Gypsum

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0 1914
Q:

Which of the following is not soluble in water?

A) Lead sulphate B) Zinc sulphate
C) Potassium sulphate D) Sodium sulphate
 
Answer & Explanation Answer: A) Lead sulphate

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1 1913
Q:

In the following reaction, fill in the blank.
Acid + Base → _______ + Water

A) Carbon dioxide B) Metal Oxide
C) Hydrogen Gas D) Salt
 
Answer & Explanation Answer: D) Salt

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1 1910
Q:

The atoms of Germanium, Arsenic, Selenium and Bromine contain ...... shells.

A) 3 B) 7
C) 5 D) 4
 
Answer & Explanation Answer: D) 4

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0 1909
Q:

Fe has 26 protons in its nucleus. What are the number of electrons in Fe2+ (II) ion?

A) 24 B) 26
C) 28 D) 13
 
Answer & Explanation Answer: A) 24

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1 1909