Chemistry Questions

Q:

Which process forms exfoliation domes?

A) biological activity B) frost wedging
C) unloading D) reactions with oxygen
 
Answer & Explanation Answer: D) reactions with oxygen

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1 1871
Q:

What is the number of groups and periods in the modern periodic table?

A) 18, 7 B) 18, 8
C) 16, 7 D) 16, 8
 
Answer & Explanation Answer: A) 18, 7

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0 1870
Q:

Atomic number of which of the following elements is greater than that of Iodine

A) Silver B) Bromine
C) Platinum D) Zinc
 
Answer & Explanation Answer: C) Platinum

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1 1870
Q:

Which of the following elements has the lowest melting point?

A) Xenon B) Iodine
C) Barium D) Magnesium
 
Answer & Explanation Answer: A) Xenon

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3 1869
Q:

Atomic number of which of the following elements is greater than that of Zinc

A) Copper B) Iron
C) Chromium D) Bromine
 
Answer & Explanation Answer: D) Bromine

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0 1868
Q:

The conversion of hard water into soft water by boiling or adding calcium hydroxide is called _______.

A) Baker's process B) Temp's process
C) Clarke's process D) Lake's process
 
Answer & Explanation Answer: C) Clarke's process

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2 1866
Q:

Which of the following inert gases is placed in period 4 of the periodic table?

A) Kr B) Rn
C) Xe D) Ar
 
Answer & Explanation Answer: A) Kr

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2 1865
Q:

The mass of proton and mass of ________ is same.

A) Neutron B) Electron
C) Isoprone D) Alpha particle
 
Answer & Explanation Answer: A) Neutron

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2 1865