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Uses of Hydrogen

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Question

If total number of elements that exist in gaseous state at room temperature is ‘X’, then the value of ‘X – 1’ will be

यदि कक्ष ताप पर गैसीय अवस्था में पाये जाने वाले तत्वों की कुल संख्या ‘X’ हो, तो ‘X – 1’ का मान होगा

A

9

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B

11

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C

10

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D

12

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Solution

The correct option is C 10
Solution

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Q. If total number of elements that exist in gaseous state at room temperature is ‘X’ and that of in liquid state is ‘Y’, then the value of ‘X – Y’ will be

यदि कक्ष ताप पर गैसीय अवस्था में पाये जाने वाले तत्वों की कुल संख्या ‘X’ हो तथा द्रव अवस्था में पाये जाने वाले तत्वों की कुल संख्या ‘Y’ हो, तो ‘X – Y’ का मान होगा

Q. Which of the following metals is found in liquid state at room temperature?

निम्नलिखित में से कौनसी धातु कक्ष ताप पर द्रव अवस्था में पायी जाती है?

Q. Which of the following statement is true for the reaction,

H_{2} + {B r}_{2} \to 2 H B r

. The rate law is

\frac{d x}{d t} = k [H_{2}] {[{B r}_{2}]}^{1 / 2}

:

Q. In the reaction

N_{2} + 3 H_{2} ⇌ 2 N H_{3}

(\frac{d x}{d t}) = 1 \times 10^{2} [N_{2}] [H_{2}]^{3} - 1 \times 10^{- 3} [N H_{3}]

and at same instant if

\frac{[N_{2}] {[H_{2}]}_{2}^{2}}{{[N H_{3}]}_{3}^{2}} = 10^{- 5} M^{2}

then at this instant value of

(\frac{d x}{d t})

Q. For the gaseous reaction :

C_{2} H_{2} + D_{2} O ⇌ C_{2} D_{2} + H_{2} O

Δ H

530 c a l

25 K_{p} = 0.82

. If X moles of

C_{2} D_{2}

will be formed, if 1 mole

C_{2} H_{2}

D_{2} O

are put together at a total pressure of 1 atm at

100

100 X

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