List of practice Questions

Cotton fibre is

Binary fission is a form of

Enzyme used in DNA replication is

Pyruvic acid is a product of

Histones are

Histones are Meristematic tissues are composed of

Bernoulli's equation is a consequence of conservation of

At higher temperature, iodoform reaction is given by

The stars twinkle while the planets do not. The stars are much bigger in size than the planets.

Solution of $Na_2CrO_4$ in water is coloured. Oxidation state of $Cr$ in $Na_2CrO_4$ is $+6$.

Rhoeo leaves contain anthocyanin pigments in epidermal cells. Anthocyanins are accessory photosynthetic pigments.

$ {PbI4}$ is a stable compound. Iodide stabilizes higher oxidation state

$NF_3$ is a weaker ligand than $N(CH_3)_3$. $NF_3$ ionizes to give $F^-$ ions in aqueous solution.

Microwave communication is preferred over optical communication. Microwaves provide large number of channels and bandwidth compared to optical signals.

Holoblastic cleavage with almost equal-sized blastomeres is a characteristic of placental animals. Eggs of most mammals, including humans, are of centrolecithal type.

A circular ring of mass $ m $ and radius $ r $ is rolling on a smooth horizontal surface with speed $ u $ . Its kinetic energy is :

A satellite is revolving around the earth in a circular orbit of radius $4$ times that of the parking orbit. The time period of the satellite is :

As shown in figure, $a$ planet revolves in elliptical orbit around the sun, where $K.E.$ of the planet is maximum :

A Carnots engine operates between $400\, K$ and $800\, K$, its efficiency is :

Which of the following cannot be the speed time graph :

A man weighing $60\, kg$ is in a lift moving down with an acceleration of $1.8\, m/s^2$. The floor exerts on him a force equal to :

The shape of an orbital is determined by :

Oxidation number $ Fe $ in $ {{K}_{3}}[Fe{{(CN)}_{6}}] $ is:

The enthalpies of all elements in their standard states are:

Which of the following turns potassium dichromate paper green?