Find the odd man out: 8, 27, 64, 100, 125, 216, 343

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Find the odd man out:
8, 27, 64, 100, 125, 216, 343

A27

B100

C125

D343

Nithin K ? Apr 21 '2018 at 15:58

Correct Answer: B [100]

Explanation:

The pattern is \(2^3, 3^3, 4^3, 5^3, 6^3, 7^3.\) But, 100 is not a perfect cube.

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Which of the following acids is found In digestive juices?

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Which of the following acids is found In digestive juices?

ALactic acid

BTannlc add

CAmIno acid

DHydrochlorIc acid

Nithin K ? Apr 21 '2018 at 15:49

Correct Answer: D [HydrochlorIc acid]

Explanation:

Hydrochloric Acid  (CHCI) is found In digestive juices in Stomach.

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Brown-ring test la used for

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Brown-ring test la used for

Aanaysis of nitrates

BIdentIfication of certain ele ments In a solution

Cmeasurement of nitrogen is an organic compound

DNone of these

Nithin K ? Apr 20 '2018 at 21:27

Correct Answer: A [anaysis of nitrates]

Explanation :

A common nitrate test, known as the brown ring test can be performed by adding iron(II) sulfate to a solution of a nitrate, then slowly adding concentrated sulfuric acid such that the acid forms a layer below the aqueous solution.

A nitrate test is a chemical test used to determine the presence of nitrate ion in solution.

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Which of the following Is widely used as an anaesthetic?

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Which of the following Is widely used as an anaesthetic?

AMethane

BAmmonia

CChlorine

DChloroform

Nithin K ? Apr 20 '2018 at 20:56

Correct Answer: D [Chloroform]

Explanation:

Chloroform  is widely used as an anaesthetic, while Chlorine Is used for bleaching as well as oxidising agent. Methane , Marsh gas is used for preparing Methyl Alcohol. formaldehyde and Chloroform Ammonia is used in ice making industries and as fertilizer.

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If 45-(28 -(37- (15 - *))] = 58. then * is equal to:

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If 45-(28 -(37- (15 - *))] = 58. then * is equal to:

A-29

B-19

C19

D29

Nithin K ? Apr 20 '2018 at 20:41

Correct Answer: C [19]

Explanation:

\(45-[28-(37-(15-?))]=58\)

\(\implies 45 -[28-(37-15-?)]=58\)

\(\implies 45 -[28-22-?]=58\)

\(\implies 45-6+?=58\)

\(39+?=58 \implies = 58-39\)

\(=19\)

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Permanent hardness of water due to sulphates of metals can be destroyed by the use of

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Permanent hardness of water due to sulphates of metals can be destroyed by the use of

AZeolites

Bsulphonides

Clime

Dnitrates

Nithin K ? Apr 20 '2018 at 20:20

Correct Answer: A [Zeolites]

Explanation:

Temporary hardness of water can be removed easily by boiling water or by adding washing soda (Sodium Carbonate-hydrated). Permanent hardness cannot be removed by merely boiling or adding washing soda.

A complex salt called sodium aluminium silicate (zeolite) is used toremove permanent hardness.

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832.58 - 242.31 = 779.84 -?

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832.58 - 242.31 = 779.84 -?

A179.57

B199.57

C295.05

DNone of these

Nithin K ? Apr 20 '2018 at 20:8

Correct Answer: D [None of these]

Explanation:

832.58 - 242.31 = 779.84 - ?

=> 590.27 = 779.84 -?

=> ? = 779.84 - 590.27

= 189.57

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