The calculated 'spin-only' magnetic moment of \(Ti ^{2+}\left(3 d^2\right)\) is :

The \(IUPAC\) name of the complex - \(\left[ Ag \left( H _{2} O \right)_{2}\right]\left[ Ag ( CN )_{2}\right]\) is :

Which of the following will be most stable diazonium salt \(RN_2^+X^-\) ?

Select the correct statements from the following \(A\). Atoms of all elements are composed of two fundamental particles. \(B\). The mass of the electron is \(9.10939 \times 10^{-31} kg\). \(C\). All the isotopes of a given element show same chemical properties: \(D\). Protons and electrons are collectively known as nucleons. \(E\). Dalton's atomic theory, regarded the atom as an ultimate particles of matter Choose the correct answer from the options given below

Match List\(-I\) with List\(-II\). 

List\(-I\)	List\(-II\)
\(A\) Coke	\(I\) Carbon atoms are \(sp ^3\) hybridised
\(B\) Diamond	\(II\) Used as a dry lubricant
\(C\) Fullerene	\(III\)  Used as a reducing agent
\(D\) Graphite	\(IV\) Cage like molecules

Choose the correct answer from the options given below :

Which is the correct thermal stablity order for \(\mathrm{H}_{2} \mathrm{E}(\mathrm{E}=\mathrm{O}, \mathrm{S}, \mathrm{Se}, \text { Te and Po) } ?\)

Mechanism of a hypothetical reaction \(X_2 + Y_2 \rightarrow 2XY,\) is given below : \((i)\,\, X_2 \rightarrow X + X\, (fast)\) \((ii)\,\,X + Y_2 \rightleftharpoons XY + Y\, (slow)\) \((iii)\,\,X + Y \rightarrow XY\, (fast)\) The overall order of the reaction will be

Which of the following statements are correct ?
A. The Amazon rainforest being cut and cleared for cultivation of soyabeans is an example of habitat loss.
B. Steller's sea cow and passenger pigeon became extinct due to over-exploitation by humans.
C. The Nile perch introduced into Lake Victoria in East Africa lead to population growth of cichlid fish in the lake.
D. Water hyacinth is an invasive species.
E. When a species becomes extinct, the plant and animal species associated with it are not affected.
Choose the correct answer from the options given below :

Following solutions were prepared by mixing different volumes of \(NaOH\) and \(HCl\) of different concentrations \((a)\;\;60\; \mathrm{mL} \frac{\mathrm{M}}{10}\; \mathrm{HCl}+40 \;\mathrm{mL} \frac{\mathrm{M}}{10} \;\mathrm{NaOH}\) \((b)\;\;55\; \mathrm{mL} \frac{\mathrm{M}}{10}\; \mathrm{HCl}+45 \;\mathrm{mL} \frac{\mathrm{M}}{10} \;\mathrm{NaOH}\) \((c)\;\;75\; \mathrm{mL} \frac{\mathrm{M}}{5}\; \mathrm{HCl}+25 \;\mathrm{mL} \frac{\mathrm{M}}{5} \;\mathrm{NaOH}\) \((d)\;\;100\; \mathrm{mL} \frac{\mathrm{M}}{10}\; \mathrm{HCl}+100 \;\mathrm{mL} \frac{\mathrm{M}}{10} \;\mathrm{NaOH}\) \(pH\) of which one of them will be equal to \(1\) ?

Which one of the following statements is correct regarding sexually transmitted diseases \((STDs)\) ?

Given below are two statements : one is labelled as Assertion \((A)\) and the other is labelled as Reason \((R)\). Assertion \((A)\): Osteoporosis is characterised by decreased bone mass and increased chances of fractures. Reason \((R)\) : Common cause of osteoporosis is increased levels of estrogen. In the light of the above statements, choose the most appropriate answer from the options given below:

Under isothermal condition, a gas at \(300 \;K\) expands from \(0. 1\;L\). to \(0.25\;L\). against a constant external pressure of \(2\;bar\). The work done by the gas is .... [Given that \(1 \;\mathrm{L} \text { bar }=100 \;\mathrm{J}\)]

Given below are some stages of human evolution. Arrange them in correct sequence. (Past to Recent) \(A\). Homo habilis \(B\). Homo sapiens \(C\). Homo neanderthalensis \(D\). Homo erectus Choose the correct sequence of human evolution from the options given below: