Explore topic-wise InterviewSolutions in Current Affairs.

An inorganic compound (A) is made of two most occuring elements in the Earth's crust and has a polymeric tetrahedral network structure. With carbon, compound (A) produces a poisonous gas (B) which is the most stable diatomic molecule. Compounds (A) and (B) will be

A
crystalline solid

[Kerala CET (Med.) 2003]

The vapour density of gas A is four times that of B. If the molecular mass of B is $M$, then the molecular mass of A will be:

If x $g$ is the mass of $NaH{C}_2{O}_4$ is required to neutralise 100 mL of 0.2 (M) $NaOH$ and y $g$ is required to reduce 100 mL of 0.02 (M) $KMn{O}_4$ in acidic medium, then:

3p orbital has _____ angular nodes

The inner transition elements are the elements in which the added electrons go to:

Chocolate brown precipitate (A) is formed when aq. $CuS{O}_4$ reacts with $K_4\left[Fe\right(CN{)}_6]$. What is the formula of A from the following?

On vigorous oxidation by acidified permanganate solution, $(C{H}_3{)}_{2}C=CH–C{H}_2–C{H}_3$ gives:

Which of the following
carbocation is most stable?

(a)
(b)

(c)

(d)

The hybridization of central atom $IC{l}_2^{+}$ is :

The number of base substitution possible in ammino acid codon is

The
ionization constant of nitrous acid is 4.5 × 10^–4.
Calculate the pH of 0.04 M sodium nitrite solution and also its
degree of hydrolysis.

1. 5

How many times does the electron go around the first orbit of hydrogen atom in one second?

Which species does not exist -

If uncertainly in the measurement of position and momentum are equal then uncertainly in the measurement of velocity is equal to

Determine the heat of transformation of C(diamond)→ C(graphite) from the following data.



$C_{\left(diamond\right)}+O_2\left(g\right)\to C{O}_2\left(g\right)△H=-94.5Kcal$



$C_{\left(graphite\right)}+O_2\left(g\right)\to C{O}_2\left(g\right)△H=-94.0Kcal$

The increasing order of the $p{K}_a$ values of the following compounds is :

Sn2 reaction depend on the what all factors

The major product obtained from the following reaction is:

The oxidation state of $Mn$ in $K_{2}Mn{O}_4$ is

Among the element $Li,N,C$ and $Be$, one with the largest atomic radius is:

5 mL of acetone is mixed with 100 mL of H₂O. Vapour pressure of water above the solution is:

It has been estimated that $93\%$ of all atoms in the entire universe are hydrogen and that the vast majority of those remaining are helium. Based on only these two elements, estimate the mass percentage of hydrogen in the universe.

Based on the given diagram, which of the following statements regarding the solutions to two miscible volatile liquids are correct?

1. Plots AD and BC show that Raoult’s law is obeyed for the solution in which B is a solvent and A is the solute and as well for that in which A is solvent and B is solute.

2. Plot CD shows that Dalton’s law of partial pressures is observed by the binary solutions of components A and B.

3. EF + EG = EH; and AC and BD corresponds to the vapour pressures of the pure solvents A and B, respectively.



Select the correct answer using the codes given below

Codes:

Which is the correct order of increasing energy of the listed orbitals in the atom of titanium ? (At. no. $Z=22$)

Reaction of ethyl chloride with sodium leads to

[NCERT 1984]

Reactions of organic chemistry will be asked only from ncert or not?if not then which is useful refrance book?