Which gas leaked In Bhopal gas tragedy?

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Which gas leaked In Bhopal gas tragedy?

ACarbon monoxide

BMethyl Isocynate

CEthyl cyanide

DPhenyl isocynate

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4+4 18 - 6 -8

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$$\frac{4+4 \times 18 - 6 -8}{123 \times 6 - 146 \times 5} =?$$

A1

B2

C6.65

D7.75

Nithin K ? Apr 21 '2018 at 20:35

Correct Answer: D [7.75]

Explanation:

Using  the BODMAS Rule:

\(\frac{4+4\times18-6-8}{123\times6-146\times5}\)

\(= \frac{4+72-6-8}{2(123\times3-73 \times5)}\)

\(=\frac{76-14}{2(369-365)}\)

\(=\frac{62}{2 \times 4}\)

\(=\frac{31}{4}\)

\(=7.75\)

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Bauxite is an ore of

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Bauxite is an ore of

AIron

Bzinc

Ctin

Daluminium

Nithin K ? Apr 21 '2018 at 20:14

Answer is: D [aluminium]

Explanation:

It is a mixture of hydrous aluminum oxides, aluminum hydroxides, clay minerals, and insoluble materials such as quartz, hematite, magnetite, siderite, and goethite. The aluminum minerals in bauxite can include: gibbsiteAl(OH)3, boehmite AlO(OH), and, diaspore, AlO(OH).

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Which of the following is always found In free stable in nature ?

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Which of the following is always found In free stable in nature ?

AGold

BSilver

CSodium

DCopper

Nithin K ? Apr 21 '2018 at 20:6

Correct Answer: A [Gold]

Explanation:

Gold is chemically very less active and hence found in free state in nature.

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Which of the following is acidic In nature ?

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Which of the following is acidic In nature ?

ASugar

BLime

CBaking Powder

DVlnegar

Nithin K ? Apr 21 '2018 at 18:39

Correct Answer: D [Vlnegar]

Explanation:

Vinegar is chemically : 4-8% Acetic Acid CH₃COOH and hence it is acidic in nature.

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The logarithm of 0.0625 to the 2 is

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The logarithm of 0.0625 to the 2 is

A-4

B-2

C0.25

D0.5

Nithin K ? Apr 21 '2018 at 18:16

Correct Answer: A [-4]

Explanation:

\(log_{2}0.0625=log_{2}\Big(\frac{625}{10000}\Big)\)

\(=log_{2}\Big(\frac{1}{16}\Big)\)

\( =log_{2}{1} - log_{2}16\)

\(=-log_{2}16\)

\(= - \text{ log}_{2}2^4\)

\(=-4\text{ log}_{2}2\)

=-4

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180 15 12 20

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$$\frac{180 \times 15- 12 \times 20}{ 140 \times 8 + 2 \times 55} = ?$$

A\frac{1}{7}

B\frac{4}{5}

C2

D4

Nithin K ? Apr 21 '2018 at 17:46

Correct Answer: C [2]

Explanation:

\(\frac{180 \times 15 - 12 \times 20}{140 \times 8 + 2 \times 55}\)

\(=\frac{20 \times 3 [9 \times 5-4]}{10[14 \times 8 +1]}\)

\(=\frac{6 \times 41}{112+11}\implies \frac{6 \times 41}{123}\)

\(=6 \times \frac{1}{3}\)

\(=2\)

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