List of practice Questions

An atom with high electronegativity has

For the reaction $ 2{{N}_{2}}{{O}_{5}}(g)\xrightarrow[{}]{{}}4N{{O}_{2}}(g)+{{O}_{2}}(g) $ if the concentration of $ N{{O}_{2}} $ increases by $ 5.2\times {{10}^{-3}} $ M in 100 s then the rate of the reaction is:

IUPAC name of $ C{{H}_{3}}CH=\underset{\begin{align} & | \\ & C{{H}_{2}} \\ & | \\ & C{{H}_{3}} \\ \end{align}}{\mathop{C}}\,C{{H}_{3}} $

Reaction of diborane with ammonia gives initially

Sphalerite is concentrated by

Complete combustion of 0.858 g of compound $ X $ gives 2.63 g of $ C{{O}_{2}} $ and 1.28 g of $ {{H}_{2}}O $ . The lowest molecular weight which $ X $ can have, is:

Adsorption is accompanied by

$20.0 \,kg$ of $N_2(g)$ and $3.0\, kg$ of $H_2(g)$ are mixed to produce $NH_3(g)$. The amount of $NH_3(g)$ formed is

Amine that cannot be prepared by Gabriel- phthalimide synthesis is

A lone pair of electrons in an atom implies

Choose the reaction with negative $\Delta$S value

Excess nitrate in drinking water can cause

Hard acids prefer to combine with

If each edge of a cube is doubled, 
(i) how many times will its surface area increase 
(ii) how many times will its volume increase

If a box of sweets is divided among 24 children, they will get 5 sweets each. How many would each get, if the number of the children is reduced by 4?

The increasing order of the density of alkali metals is

Which one of the following has the highest molar conductivity?

In the adsorption of a gas on solid, Freundlich isotherm is obeyed. The slope of the plot is zero. Thus, the extent of adsorption is

The compound ${[Pt(NH3)2Cl2]}$ can exhibit

Freon-12 is manufactured from tetrachloromethane by

The compound that undergoes dehydration very easily is

Which of the following is the least basic amine?

The values if ?H and ?S for the reaction C(graphite) + CO(g) ?2CO(g) Are 170 kJ and 170 JK-1 respectively. The reaction will be spontaneous only a

An electric buib rated 220 V, 100 W is connected in series with another bulb rated 220 V, 60 W. If the voltage across the combination is 220 V, the power consumed by the 100 W bulb will be about

If a current of 500 mA produces a deflection of $ 30^\circ $ in a tangent galvanometer, then the current that produces a deflection of $ 60^\circ $ is