List of practice Questions

The statement that is NOT correct is
$ {X ->[{\text{Ozonolysis}}][{\text{(Reductive)}}] Y + Z}$ $Y$ can be obtained by Etard's reaction, $Z$ undergoes disproportionation reaction with concentrated alkali. $X$ could be
What is a period of revolution of earth satellite ? Ignore the height of satellite above the surface of earth. Given : (1) The value of gravitational acceleration $g= 10\,ms^{-2}$ (2) Radius of earth $R_E = 6400\, km$. Take $\pi = 3.14$
In a triangle $ABC, a[b \,cos \,C - c\, cos\, B]$ =
In anomalous expansion of water, at what temperature, the density of water is maximum ?
Match the following and select the correct answer. (A) Centriole - (i) lnfoldings in mitochondria (B) Chlorophyll - (ii) Thylakoids (C) Cristae - (iii) Nucleic acids (D) Ribozymes - (iv) Basal body of cilia or flagella
A 4 metre long ladder weighing 25 kg rests with its upper end against a smooth wall and lower end on rough ground. What should be the minimum coefficient of friction between the ground and the ladder for it to be inclined at 60? with the horizontal without slipping ? (Take $g = {10 \,m \,s^{-2}}$)
Which one of the following fungi contains hallucinogens?
Which of the following shows coiled RNA strand and capsomeres?
Viruses have
Which one of the following living organisms completely lacks a cell wall?
Planaria possesses high capacity of
A marine cartilaginous fish that can produce electric current is
The speed of sound through oxygen gas at $T \, K$ is $v \,m \,s^{-1}$. If the temperature becomes $2T$ and oxygen gas dissociated into atomic oxygen, the speed of sound
A long straight wire carries 10 $A \,d.c$. current an electron travels perpendicular to the plane of this wire at a distance $0.1\, m$ with velocity $5.0 \times10^6 m \,s^{-1}$. Force acting on the electron due to current in wire is
The hybridization of central metal ion in $K_2[Ni(CN)_4]\, and\, K_2[NiCl_4]$ are respectively
Which one of the following is not explained by adsorption?
An aromatic compound $A (C_7H_9N)$ on reacting with $NaNO_2/HCl$ at $0^\circ\,C$ forms benzyl alcohol and nitrogen gas. The number of isomers possible for the compound $'A'$ is
Terylene is NOT a
A pipe $30\, cm$ long, is open at both ends. Which harmonic mode of the pipe resonates a $1.1\, kHz$ source? (Speed of sound in air = $330 \,m \,s^{-1})$
A spherical conductor of radius $2 \,cm$ is uniformly charged with $3 \,nC$. What is the electric field at a distance of $3\, cm$ from the centre of the sphere ?
A solenoid of inductance $2H$ carries a current of $1A$. What is the magnetic energy stored in a solenoid ?
Statement A : Photorespiration decreases photosynthetic output Statement B : In photorespiratory pathway, neither ATP nor NADPH is produced.
The result of the following reaction/experiment carried out by Avery et. al. on Streptococcus pneumonia has proved conclusively that DNA is the genetic material;
Parbhani kranti, a variety of bhindi (lady's finger), is resistant to _______