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Chemistry

Chemistry
Which of the following is not a donor atom?

Phosphorus
Antimony
Arsenic
Aluminium

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Chemistry
Milk is a

Metal
Element
Mixture
None of these

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Chemistry
The presence of Cobalt in Vitamin B12 was established for the first time by

Borax-Bead test
Sodium Nitroprusside test
Spectroscopy
Hydrolysis test

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Chemistry
The material which can be deformed permanently by heat and pressure is called a

polymer
chemical compound
thermoset
thermoplastic

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Chemistry
Which of the following can be found as pollutants in the drinking water in some parts of India? Select the correct answer using the code given below.(A) Arsenic (B) Sorbitol (C) Fluoride (D) Formaldehyde (E) Uranium

B, D and E
A, B, C, D and E
A, C and E
A and C

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Chemistry
What is the covalency of nitrogen in ammonia molecule

2
3
5
4

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