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Consider a reaction $A\to B+C$. If the initial concentration was reduced from 2M to 1M in 1 hr and from 1 M to 0.25 M in 2 hr, the order of the reaction is

Which one of the following does not give precipitate with ammoniacal cuprous chloride?

A sugar syrup (containing sugar and water only) of weight 214.2 g contains 34.2 g of sugar ($C_{12}{H}_{22}{O}_{11}$). Find the mole fraction of the sugar in the syrup.

Ethanol is converted into ethlyl chloride by reacting with

Which of the following compound has the highest $\stackrel{\ast }{C}-H$ bond energy?

Question 10

Hydrogen peroxide is .......

(a) an oxidising agent

(b) a reducing agent

(c) both an oxidising and a reducing agent

(d) neither oxidising nor reducing agent

Aluminium vessels should not be washed with materials containing washing soda because:

Ethyl bromide and bromocyclohexane are treated with ammonia separately with ammonia, the products formed respectively are

In the following reaction sequence, the correct structures of E, F and G are:

Write
chemical reaction for the preparation of phenol from chlorobenzene.

The flocculation values of $KCl$, $MgC{l}_2$, $CrC{l}_3$ and $SnC{l}_4$ for a negatively charged sol are in the order:

The species present in solution when $C{O}_2$ is dissolved in water are

An iodized salt contains 0.5 $\%$ of NaI. A person consumes 3 gm of salt every day. The number of iodide ions going into his body every day is

Which of the following is the example of SN² reaction

[CPMT 1999]

Which of the following is/are true?

In the
reaction acts as a

[MP PET 1995]

Ratio of radii of third and second orbits of $H$ atom is:

In the following reaction A and B are

A conductor wire having ${10}^{29}$ free electrons per unit volume carries a current of $20\text{A}$. If the cross-section of the wire is $1{\text{mm}}^2$, then the drift velocity of electrons will be -



Take $e=1.6\times {10}^{-19}\text{C}$



​​​​​​​$[$0.77 Mark$]$

The density of 2 M aqueous solution of NaOH is 1.28 g/cm 3 . The molality of the solution is [Given that molecular mass of NaOH = 40 g mol –1 ] (1) 1.20 m (2) 1.56 m (3) 1.67 m (4) 1.32 m

Regarding X and Y the correct statements are

A. Both X and Y are transitional elements

B. Atomic size of Y < Atomic size of X

C. Y is also catalyst in Sabatier - Senderen's reaction

D. X is also a catalyst in dehydrogenation of alcohols

During isolation of fluorine, when $KH{F}_2$ is electrolysed then, is produced at the cathode and at the anode as the final product.

The packing efficiency of the two-dimensional square unit cell shown below is