Sodium salts of carboxylic acids \(( RCOONa )\) when heated with sodalime, yield

Which of the following is a fat soluble vitamin?

In \(\left[ Ni ( en )_3\right] Cl _2\), the geometry of Ni is:

The statement which is not true -
(A) Boiling point of ethanol is greater than that of ethoxyethane due to H -bonding
(B) Ethoxyethane is soluble in water due to H-bonding
(C) Ethanol is soluble in water due to H -bonding
(D) Ethoxyethane has nearly same boiling point as that of butanol
Choose the correct answer from the options given below :

For a non ideal solution exhibiting positive deviation:
A. The vapour pressure is lower than that predicted by Raoult's law
B. The vapour pressure is higher than that predicted by Raoult's law.
C. The interaction at the molecular level are weaker than in the pure state.
D. The interaction at the molecular level are stronger than in the pure state.
E. Mixture of chloroform and acetone is a suitable example.
Choose the correct answer from the options given below:

Out of the following which will be see-saw shaped?
A. \(\text{XeO}_2\text{F}_2\)
B. \(\text{SF}_4\)
C. \(\text{BrF}_3\)
D. \(\text{XeO}_4\)
Choose the correct answer from the options given below:

Catalytic hydrogenation of ketones with lithium aluminium hydride gives

Read the given paragraph carefully and answer the following questions:
Since the DNA is enclosed within the membranes, we have to break the cell open to release DNA along with other macromolecules such as RNA, proteins, polysaccharides and also lipids. This can be achieved by treating the bacterial cells/plant or animal tissue with enzymes such as lysozyme (bacteria), cellulase (plant cells), chitinase (fungus). There are some basic steps in genetically modifying an organism (i) identification of DNA with desirable genes; (ii) introduction of the identified DNA into the host; (iii) maintenance of introduced DNA in the host and transfer of the DNA to its progeny. Agrobacterium tumifaciens, a pathogen of several dicot plants is able to deliver a piece of DNA known as 'T-DNA' to transform normal plant cells into a tumor and direct these tumor cells to produce the chemicals required by the pathogen. Other molecules can be removed by appropriate treatments and purified DNA ultimately precipitates out after the addition of chilled ethanol. Selection of recombinants due to inactivation of antibiotics is a cumbersome procedure because it requires simultaneous plating on two plates having different antibiotics. Therefore, alternative selectable markers have been developed which differentiate recombinants from non-recombinants on the basis of their ability to produce colour in the presence of a chromogenic substrate. In this, a recombinant DNA is inserted within the coding sequence of an enzyme, ß-galactosidase. This results into inactivation of the gene for synthesis of this enzyme, which is referred to as insertional inactivation.
The purified DNA ultimately precipitates after the addition of:

There are four capacitors: \( C_1, C_2, C_3 \) and \( C_4 \) with equal capacitance \( C_0 \).
(A) for capacitor \( C_1 \) area of the plates is doubled
(B) for capacitor \( C_2 \) distance between the plates is tripled
(C) the capacitor \( C_3 \) is filled completely with a material having dielectric constant K = 3
(D) for capacitor \( C_4 \) there is no change
If the capacitors are arranged in decreasing order of their capacitances, then choose the correct answer from the options given below:

An ammeter and a Voltmeter are to be connected in a circuit. Which of the following statements are correct?
(A) Ammeter has negligible resistance.
(B) Ammeter is always connected in series in the circuit.
(C) Voltmeter should have negligible resistance.
(D) Voltmeter should be connected in parallel so that the whole current may pass through it.
Choose the correct answer from the options given below:

In a circuit where current 3I enters at A, with semicircular sections ABC and ADC of equal radii r, resistances 2R and R respectively, the magnetic field at the center is :

Smack is chemically:

Partial Roasting of chalcopyrite produces :