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NISCHAY DAS

Studied Bachelor of Education at VIMAL BIBHUTI COLLEGE OF EDUCATION (SABOUR , BHAGALPUR)
Chemistry Teacher at INDIVIDUAL
Live in Bhagalpur,India, Bihar
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I HAVE COMPLETED MY BACHELOR'S IN CHEMISTRY & I AM A CHEMISTRY MASTER'S DEGREE H...
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NISCHAY DAS
13 Aug 2020 05:34 PM study24x7 study24x7

What happens to a helium atom when it loses an electron ?

A

It becomes a alpha particle

B

It becomes a negative Helium ion

C

It becomes a positive Helium ion

D

It becomes a proton

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NISCHAY DAS
13 Aug 2020 05:33 PM study24x7 study24x7

Which of these artificial sweeteners has the highest sweetness value?

A

Saccharin

B

Sucralose

C

Aspartame

D

Alitame

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NISCHAY DAS
13 Aug 2020 05:31 PM study24x7 study24x7

Which of the following is used as a food preservatives ?

A

Table salt

B

Salts of Sorbic Acid

C

Sodium Benzoate

D

All of the Above

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NISCHAY DAS
13 Aug 2020 05:30 PM study24x7 study24x7

Which of these salts is responsible for the hardness of water?

A

Calcium

B

Magnesium

C

Sodium

D

Both a and b

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NISCHAY DAS
13 Aug 2020 05:28 PM study24x7 study24x7

Which of these non-metals is commonly used in fire-crackers?

A

Silicon

B

Neon

C

Sulphur

D

Fluorine

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NISCHAY DAS
13 Aug 2020 05:27 PM study24x7 study24x7

Which of these polymer is commonly used in making parachute ropes

A

Bakelite

B

Nylon -66

C

Neoprene

D

SBR

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NISCHAY DAS
13 Aug 2020 05:26 PM study24x7 study24x7

Which of these is a Thermoplastic polymer?

A

Terylene

B

Polythene

C

PVC

D

All of the Above

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NISCHAY DAS
12 Aug 2020 05:17 PM study24x7 study24x7

Which of the following reactions represents changing of green colour of ferrous sulphate?

A

Double Displacement Reactions

B

Displacement reaction

C

Combination Reactions

D

Decomposition Reaction

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NISCHAY DAS
12 Aug 2020 05:14 PM study24x7 study24x7

49.Which of the following is an endothermic reaction?

A

Decomposition of calcium carbonate to calcium oxide and carbon dioxide

B

Respiration

C

Burning of Natural Gas

D

All of the Above

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NISCHAY DAS
12 Aug 2020 05:12 PM study24x7 study24x7

47.Which of the following is emitted in alpha decay?

A

Helium Nucleus

B

Hydrogen Nucleus

C

Electrons

D

Carbon Nucleus

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