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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Filed Under: Chemistry
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Q:

Electrons in the highest energy level of an atom are called ________.

A) valence protons	B) orbital protons
C) valence electrons	D) orbital electrons

Answer & Explanation Answer: C) valence electrons

Explanation:

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Filed Under: Chemistry
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Q:

Read each sentence to find out whether there is any grammatical error in it. The error, if any, will be in one part of the sentence. If there is no error, the answer is ‘No error’. (Ignore the errors of punctuation, if any.)

The coverage of schemes remain /patchy because of rampant / leakages, and poor execution / and monitoring. / No error

A) The coverage of schemes remain	B) patchy because of rampant
C) leakages, and poor execution	D) and monitoring

Answer & Explanation Answer: A) The coverage of schemes remain

Explanation:

'The coverage of schemes remains' should be used to make the sentence correct. Here the noun is 'coverage' that’s why we should use 'remains' instead of 'remain'.

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Filed Under: English
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Q:

Ethylene is a ______ molecule.

A) polar	B) ionic
C) covalent	D) nonpolar

Answer & Explanation Answer: D) nonpolar

Explanation:

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Filed Under: Biology
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Q:

Each trait in the child can be influenced by ______ DNA.

A) only paternal	B) only maternal
C) both paternal and maternal	D) neither paternal nor maternal

Answer & Explanation Answer: C) both paternal and maternal

Explanation:

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Filed Under: Biology
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Q:

Molecular clocks are based on the idea that _____.

A) On average neutral mutations arise at a constant rate	B) Directional selection occurs at a constant rate
C) Mutations occur once every generation	D) Molecules resonate at a certain frequency that can be measured

Answer & Explanation Answer: C) Mutations occur once every generation

Explanation:

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Filed Under: Biology
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Q:

Two chords AB and PQ of a circle intersect at D inside a circle. If AD = 4 cm, DB = 6 cm, QD = 3 cm, the length of PQ is equal to

A) 11 cm	B) 8 cm
C) 9 cm	D) 10 cm

Answer & Explanation Answer: A) 11 cm

Explanation:

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Filed Under: Quantitative Aptitude - Arithmetic Ability

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Q:

Where was paper invented?

A) China	B) India
C) Zambia	D) Germany

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