List of practice Questions

In Ramsden eyepiece, the two planoconvex lenses each of focal length $ f $ are separated by a distance $ 12\,cm $ . The equivalent focal length (in $ cm $ ) of the eyepiece is

In a region, steady and uniform electric and magnetic fields are present. These two fields are parallel to each other. A charged particle is released from rest in this region. The path of the particle will be a :

Identify the reaction for which $\Delta H\ne \Delta E.$

Hydrolysis of $NCl _{3}$ gives $NH _{3}$ and $X$. Which of the following is $X$ ?

Which of the following compounds when heated with $CO$ at $150^{\circ} C$ and $500$ atm pressure in presence of $BF _{3}$ forms ethyl propionate ?

Which of the products is formed when acetone is reacted with barium hydroxide solution?

When acetaldehyde is heated with Fehling solution, a red precipitate is formed. Which of the following is that?

What is the correct order of occurrence ($\%$ by weight) in air of $Ne , Ar$ and $Kr$ ?

A solution of an acid has $\left[ H ^{+}\right]=2 \times 10^{-5}$. Find out the concentration of $OH ^{-}$ions.

Which of the following is added to chloroform to slow down its aerial oxidation in presence of light?

From Williamson's synthesis preparation of which of the following is possible?

The disperse phase, dispersion medium and nature of colloidal solution (lyophilic or lyophobic) of 'gold sol' respectively, are

In CAM plants, $ CO_2 $ acceptor is

For a system to follow the law of conservation of linear momentum during a collision, the condition is (1) total external force acting on the system is zero. (2) total external force acting on the system is finite and time of collision is negligible. (3) total internal force acting on the system is zero.

Female gametophyte of angiosperms is represented by

During the life-cycle, Fasciola hepatica (liver fluke) infects its intermediate host and primary host at the following larval stage respectively

Diwali rocket is ejecting 50 g of gases/s at a velocity of 400 m/s. The accelerating force on the rocket will be

Development of fruit without fertilization is called

What is the equation for the equilibrium constant $ ({{K}_{c}}) $ for the following reaction? $ \frac{1}{2}A(g)+\frac{1}{3}B(g)\frac{2}{3}C(g) $

$ A\,\,0.5\,\,g/L $ solution of glucose is found to be isotonic with a $ 2.5\,\,g/L $ solution of an organic compound. What will be the molecular weight of that organic compound?

$ t- $ butyl chloride preferably undergo hydrolysis by

What is the wavelength (in $ m $ ) of a particle of mass $ 6.62\times {{10}^{-29}}g $ moving with a velocity of $ {{10}^{3}}\,\,m{{s}^{-1}} $ ?

What is the electrode potential (in $ V $ ) of the following electrode at $ {{25}^{o}}C $ ? $ N{{i}^{2+}}(0.1\,\,M)|Ni(s) $ (Standard reaction potential of $ N{{i}^{2+}}|Ni $ is $ -0.25\,\,V,\,\,\frac{2.303RT}{F}=0.06) $

Coenocytic thallus is found in

Tendon and ligaments are specialised types of