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Q:

What was the element used in traditional thermometers which is highly toxic in nature?

A) Carbon B) Mercury
C) Arsenic D) Cadmium
 
Answer & Explanation Answer: B) Mercury

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Q:

Common salt (NaCl) is made up of

A) a weak acid and a weak base B) a strong acid and a weak base
C) a weak acid and a strong base D) a strong acid and a strong base
 
Answer & Explanation Answer: D) a strong acid and a strong base

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Q:

Propyne and propene can be distinguished by

A) AgNO₃ in ammonia B) conc. H₂SO₄
C) dil. KMnO₄ D) Br₂ in CCl₄
 
Answer & Explanation Answer: A) AgNO₃ in ammonia

Explanation:

Propene, being an alkene, and propyne, being a alkyne, are distinguished using the common chemical tests namely ammoniacal silver nitrate or ammoniacal cuprous chloride. Ammoniacal silver nitrate is also called as Tollen's reagent.

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Q:

Who stated the following law : 'The properties of the elements are the periodic function of their atomic masses'?

A) Dobereiner B) Moseley
C) Newlands D) Mendeleev
 
Answer & Explanation Answer: D) Mendeleev

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Q:

In the Modern Periodic Table, elements are arranged in

A) increasing atomic mass number B) increasing atomic number
C) decreasing atomic mass number D) decreasing atomic number
 
Answer & Explanation Answer: B) increasing atomic number

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Q:

In the following question, some part of the sentence may have errors. Find out which part of the sentence has an error and select the appropriate option. If a sentence is free from error, select 'No Error'.

Since they were all dressed up,(A)/she assumed they(B)/were going to church together.(C)/No error(D)

A) A B) B
C) C D) D
 
Answer & Explanation Answer: D) D

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Q:

Mount Abu is a hill station located in _____ ranges.

A) Vindhya B) Satpuda
C) Aravalli D) Sahyadri
 
Answer & Explanation Answer: C) Aravalli

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Q:

The tallest peak of which of the following mountain ranges is a mountain called 'Guru Shikhar'?

A) Western Ghats Range B) Satpura Range
C) Aravalli Range D) Vindhya Range
 
Answer & Explanation Answer: C) Aravalli Range

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