List of practice Questions

The first ionization enthalpies of Na, Mg and Si are respectively 496, 737 and 786 kJ mol−1. What would be the first ionization enthalpy of Al in kJ mol−1?
Women have which type of sex chromosomes?
Coal, Petroleum (oil) and Natural Gas belong to which type of fuels?
The bond angle is maximum in which of the following molecules?
The smooth and rough endoplasmic reticulum are involved in the synthesis of
The correct combinations among the following:
ScientistEvent / Contribution
I. Miescher Named nuclein
II. FisherDiscovered purines
III. AltmanIsolated nucleic acids
IV. FranklinDNA X-ray diffraction
Choose among the following the characters of Ophiuroidea of phylum Echinodermata:

Match the following
 

List I List II 
I.Helical virusA.Bacteriophage
II.GlycoproteinB.Rabies virus
III.Complex virusesC.Influenza virus
IV.Enveloped virusD.Measles virus
A body 'A' of mass $ m_1 $ moving with a velocity of 6 m/s collides with another body 'B' of mass $ m_2 $ which is at rest. After collision if 'A' moves with 2 m/s and 'B' moves with 3 m/s in the initial direction of A, then the ratio of $ \frac{m_1}{m_2} $ is
Which of the following reactions are endothermic and spontaneous?
Assertion (A): Loss or gain of a segment of DNA results in alteration in chromosomes.
Reason (R): Alterations in chromosomes do not result in abnormalities.
The heart receives only deoxygenated blood in

Match the following sex-determination systems with examples

TypeExamples
A. XX-XOi. Birds, Reptiles
B. XX-XYii. Moths, Few butterflies
C. ZO-ZZiii. Grasshoppers, Cockroaches
D. ZW-ZZiv. Drosophila
The force acting per unit length when a very long straight conductor is carrying a steady current of 1 A and the direction of the current is from south to north is (The horizontal component of the earth's magnetic field at the place is \( 3 \times 10^{-5} \) T and the direction of the field is from the geographical south to geographical north.)
When 'X' g of graphite is completely burnt in a bomb calorimeter in excess of \( O_2 \) at 298 K and 1 atm pressure as given in the equation $$ \text{C(graphite)} + O_2(g) \rightarrow CO_2(g) $$ The temperature of calorimeter raised from 298 K to 302 K. If the heat capacity of the calorimeter and molar enthalpy change for the reaction at 1 atm and 298 K are 20.7 kJ K\(^{-1} \) and -248.4 kJ mol\(^{-1} \), 'X' in g is
Molar conductivities at infinite dilution \( \Lambda_m^\circ \) for \( Ba(OH)_2 \), \( BaCl_2 \) and \( NH_4Cl \) are 457.6, 240.6 and 213.0 \( S cm^2 mol^{-1} \) respectively. The \( \Lambda_m^\circ \) for ammonium hydroxide (in \( S cm^2 mol^{-1} \)) is
A standing wave having 3 nodes and 2 antinodes is formed between two atoms separated by a distance of \( 1.21 \, \text{\AA} \). The wavelength of the wave is:
A student has identified certain fungi given below and classified under this number of classes. Mucor, Claviceps, Puccinia, Albugo, Neurospora
Choose the correct statement related to the morphology of Cassia
The hypodermis tissues in dicot and monocot stems respectively
Identify the correct statement in relation to Paramecium
Assertion (A): Life cycle of ectoparasites is more complex with many developmental stages.
Reason (R): Developmental stages of endoparasites have better chances to reach definitive host.

Match the column I with Column II.

Identify the correct option: Statement-I (S-I): Test tube baby undergoes development within the test tube.
Statement-II (S-II): In IVF-ET method, fertilization occurs inside the body.
A satellite of mass 500 kg is in an orbit around the earth at a distance of \( 6.67 \times 10^6 \, m \) from the center of the Earth. The speed of the satellite is: