Question 1 of 10

Propyne is treated with sodamide and the product is treated with methyl iodide to get

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Question 2 of 10

Oxidation states of P in {tex}H_4 P_2 O_5, H_4 P_2 O_6, H_4 P_2 O_7{/tex} are respectively.

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Question 3 of 10

A sample of radioactive substance with half-life of 3 days was found to contain only 3g of it, when received exactly 12 days after sealing.The amount of the radeioactive substance when it was sealed, was :

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Question 4 of 10

If α, β, γ are the angles made by a straight line with the coordinate axes, then sin2α+sin2β+sin2γ is

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Question 5 of 10

Which of the following on thermal decomposition yields a basic as well as an acidic oxide?

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Question 6 of 10

A spring of force constant k is cut into two pieces such that one piece is double the length of the other. The force constant of the longer piece will be

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E

Question 7 of 10

For the data

the Karl Pearson coefficient is

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E

Question 8 of 10

A beaker containing a liquid appears to be half when it is actually two third full. The refractive index of liquid is

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Question 9 of 10

The oxidation state of the most electronegative element in the products of the reaction between {tex}BaO_2{/tex} and {tex}H_2SO_4{/tex} are:

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Question 10 of 10

Among the following compounds, the one that gets hydrolysed to form metallic hydroxide, hydrogen peroxide and oxygen is

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