List of practice Questions

Which one is the wrong statement ?

The conversion of ethyl bromide to ethyl iodide using sodium iodide and dry acetone, this reaction is known as

A spherical black body with a radius of $12\,cm$ radiates $450\,watt$ power at $500\,K$. If the radius were halved and the temperature doubled, the power radiated in watt would be :

Which of the following in sewage treatment removes suspended solids ?

If there are 999 bases in an RNA that codes for a protein with 333 amino acids, and the base at position 901 is deleted such that the length of the RNA becomes 998 bases, how many codons will be altered ?

Which of the following RNAs should be most abundant in animal cell ?

Identify the correct statement in the following

A reaction has both $\Delta \,H$ and $\Delta \,S$ - ve The rate of reaction

Addition of mineral acid to an aqueous solution of Borax, the following compound is formed

Bactericidal antibiotics among the following is

Which of the following element forms $p_{\pi} - p_{\pi}$ bond with itself ?

Which of the following structure of a molecule is expected to have three bond pairs and one lone pair of electrons ?

If $tan^{-1} \,x + tan^{-1} \,y = \frac{4\pi}{5}$, then $cot^{-1}\, x + cot^{-1} \,y$ is equal to

The co-ordination number and the oxidation state of the element $'M'$ in the complex $[ M(en)_{2}(C_{2}O_{4})]NO_{2}$ $\{$ where (en) is ethane-1,2-diamine) are, respectively

Which of the following aqueous solution has highest freezing point ?

Which of the following is the correct electron dot structure of $N_2O$ molecule ?

For a first order reaction $A \to P,$ the temperature (T) dependent rate constant (k) was found to followthe equation log k=- (2000) $\frac{1}{T}+6.0.$ The pre-exponential factor A and the activation energy $E_{a,}$ respectively, are

Which of the following cell organelles is responsible for extracting energy from carbohydrates to form ATP ?

Select the mismatch :

For the reaction $CO ( g )+\frac{1}{2} O _{2}( g ) \rightarrow CO _{2}( g )$ Which one of the statement is correct at constant $T$ and $P$ ?

For the reaction $H _{2}( g )+ Br _{2}( g ) \rightarrow 2 HBr ( g )$, the experiment data suggested that $r = k \left[ H _{2}\right]\left[ Br _{2}\right]^{1 / 2} .$ The molecularity and order of the reaction are respectively:

The S.I. unit of specific heat capacity is

Which of the following are found in extreme saline conditions ?

Which of the following components provides sticky character to the bacterial cell ?