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A system is changed from state A to state B by one path and from B to A by another path. If $E_{1}$ and $E_{2}$ are the corresponding changes in internal energy, then [Pb. PMT 2001]:
The difference between amylose and amylopectin is
A string of length $l$ is fixed at both ends and is vibrating in second harmonic. The amplitude at antinode is $2\text{ mm}$. The amplitude of a particle at a distance $l/8$ from the fixed end is:
A nucleus of mass number 189 splits into two nuclei having mass numbers 125 and 64. The ratio of the radius of two daughter nuclei respectively is:
The work done to contract a gas in a cylinder is 462 joules. 128 joule energy is evolved in the process. What will be the internal energy change in the process? [MP PMT 2003]
What is the fate of the male gametes discharged in the synergid?
The correct thermodynamic conditions for the spontaneous reaction at all temperatures is:
Match List - I with List - II List - I (Type of flower) (A) Zygomorphic (B) Hypogynous (C) Perigynous (D) Epigynous List - II (Example) (I) Mustard (II) Plum (III) Cassia (IV) Cucumber
According to Robert May, the global species diversity is about
The reaction can be classified as:
If a particle moves in a circle describing equal angles in equal times, its velocity vector:
Elimination reaction of 2-Bromo-pentane to form pent-2-ene is (a) $\beta$-Elimination reaction (b) Follows Zaitsev rule (c) Dehydrohalogenation reaction (d) Dehydration reaction
The flowers are Zygomorphic in: (a) Mustard (b) Gulmohur (c) Cassia (d) Datura (e) Chilli Choose the correct answer from the options given below:
Which of the following is not a cloning vector?
Natural methods for contraception work on the principle of:
Three sound waves of equal amplitudes have frequencies of $(n-1), n,$ and $(n+1)$. They superimpose to give beats. The number of beats produced per second will be:
To ensure that only the desired pollens fall on the stigma in artificial hybridization process: a: the female flower buds of plant producing unisexual flower need not be bagged. b: there is no need to emasculate unisexual flowers of selected female parent. c: emasculated flowers are to be bagged immediately after cross pollination. d: emasculated flowers are to be bagged after removal of anthers. e: bisexual flowers, showing protogyny are never selected for cross. Choose the correct answer from the options given below:
The freezing point depression constant ($K_f$) of benzene is 5.12 K kg $mol^{-1}$. The freezing point depression for the solution of molality 0.078 m containing a non-electrolyte solute in benzene is (rounded off upto two decimal places) :
Match List-I with List-II List-I (Taxonomic Category) (A) Family (B) Order (C) Class (D) Division List-II (Example) (i) Polymoniales (ii) Solanaceae (iii) Angiospermae (iv) Dicotyledonae
The mother has A+ blood group, the father has B+ and the child is A+. What can be possible genotypes of all three, respectively?