1 mole of electron has mass in microgram
1.1.008 x 10-3
2.5.5 x 10-4
3.1.84 x 10-4
4.1.673 x 10-3
A solution can be both
1.dilute and concentrated
2.dilute and saturated
3.saturated and unsaturated
4.saturated and super saturated
1.1 x 10-1
2.1 x 10-14
3.1 x 10-7
All the transition elements show
1.Similar physical properties
2.Similar chemical properties
3.Both a and b
1.molecules become more disordered.
2.K.E of the molecules decreases
3.intermolecular forces become weaker.
4.molecules move more frequently.
1.1s2 2s2 2p6 3s2 3p6 3d7
2.1s2 2s2 2p6 3s2 3p6 4s2 4p5
3.1s2 2s2 2p6 3s2 3p5 3d10
4.1s2 2s2 2p6 3s2 3p6 4s23d5
Benzene is a good solvent for
4.all the above
Butyl chloride gives possible isomers.
Consider the following redox reaction. Zn+dil HNO3? Zn (NO3)2 + N2O + H2O The coefficient number of HNO3 in the equation is
Fruit juices and fizzy drinks such as lemonade are often sold in aluminium cans. What is the most important reason aluminium is a suitable metal?
1.aluminium can be recycled
2.aluminium has very low density
3.aluminium is the most abundant metal in the earth crust
4.aluminium is resistant to corrosion by organic acids.
If a graph is plotted between temperature on x-axis and volume on y-axis for 1 mole of gas then we get straight line which cuts the temperature exis at
1.Average kinetic energy of molecules
2.Vibrational kinetic energy
3.Translational kinetic energy
4.None of the above
In the van der Waals equation (P + n2a / v2) (v - nb) = nRT which of the following statement is not true?
1.n2a/v correct for the intermolecular forces.
2.nb correct for the volume occupied by gas molecules.
3.at high densities the equation reduces to the ideal gas law
4.all of the above statements are correct.
In which of the following type of reactions energy of reactant is greater than energy of product
Metallic crystals are soluble in
2.Non polar solvent
Methyl alcohol is not used as
2.an anti freezing agent
3.a substitute for petrol
4.for denaturing of ethyl alcohol
Oxygen (molecular weight = 32) diffuses at a rate of 10cm3/min under the same conditions of temperature and pressure how fast will hydrogen (molecular weight = 2) diffuse?
4.Single beam balance
Purines and pyrimidines are
1.4.0 x 10-8
2.3.2 x 10-11
3.2.0 x 10-8
4.4.0 x 10-12
The hardest of the following solids is
The inhaled breath of diabetics patient contain acetone. A medical student wishes to test for diabetes by asking patient to bubble their breath through a reagent.
1.alkaline aquenous iodine
1.one ? one ? bond
2.two ? one ? bond
3.one ? and two ? bond
4.three ? bonds only
The rectified spirit is
The unit of molality is
When an electron is moving with velocity of 2.188 x 106 ms-1 in the first orbit of Bohrs model of hydrogen. The de Broglie wavelength of electron is
When aquious bromine is added to aqueous phenol a creamy white ppt is obtained. What does this reaction show?
1.phenol is unsaturated
2.2-bromophenol is insoluble in water
3.a hydroxy group makes the benzene ring more susceptible to electrophilic attack
When methl iodide and ethyl iodide are treated with sodium metal possible major products are obtained.
Which of the following is mineral fibre.
1.whole amount of reactant does not change into product
2.chemical equilibrium is established
3.a catalyst changes the direction of reaction
4.rate of forward reaction decreases as reaction proceeds
Which of the following molecule is polar
4.none of the above
1.Kc is constant at given temperature
2.Kc is unaffected by change in concentration of reactants or products
3.Kc indicates the extent of reaction but not about the rate of reaction.
4.All of the above
1.they cast shadow
2.they possess momentum
3.they are negatively charged
4.all of the above
1.?H = ?H1 + ?H2 = ?H3
2.?E = E1 + E2 = E3
3.q = q1 + q2 = q3
4.??H (cycle) = 0
4.None of the above
1.size of Cl atoms > Cl- ion
2.size of Na+ ion < Na atom
3.size of Na atom < Na+ ion
4.Cl- < Na+
4.none of the above
1.Electrons fill orbitals with parallel spins until all the orbitals of the same energy are half filled then they go into sub-shells with anti-parallel (opposite) spin.
2.The electrons in the same atom cannot have the same four quantum numbers
3.There is maximum of two electrons is an orbital.