The C-O-H bond angle in alcohols is slightly less than tetrahedral angle \(109^{\circ} 28^{\prime}\) due to:

Answer the question on the basis of passage given below :
There are some deposits of nitrates and phosphates in the earth’s crust. Nitrates are more soluble in water. Nitrates are difficult to reduce under laboratory conditions, but microbes do it easily. Ammonia forms a large number of complexes with transition metals. Hybridisation easily explains the ease of sigma donation capability of NH₃ and PH₃. Phosphine is an inflammable gas, prepared from white phosphorus.
Which of the following is the correct statement?
A. Between NH₃ and PH₃, NH₃ is a better electron donor because the lone pair of electrons occupy spherical 's' orbital and is less directional.
B. Between NH₃ and PH₃, NH₃ is a better electron donor because the lone pair of electrons occupies sp³ orbital and is more directional.
C. Between NH₃ & PH₃, PH₃ is a better electron donor because the lone pair of electrons occupies sp² orbital and is more directional.
D. Between NH₃ & PH₃, PH₃ is a better electron donor because the lone pair of electrons occupies 's' orbital and is less directional.
Choose the most appropriate answer from the options given below:

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A homogeneous mixture of two or more than two components has uniform composition and properties. The binary solutions have two components, which may be solid, liquid or gas. The resultant solution has a larger amount of solvent and a smaller amount of solute. The amount of solute in a given amount of solvent decides the concentration of the resulting solution. The concentration can be expressed in various ways, like molarity, molality, normality and mole fraction.
Molarity of a solution containing 8 grams \(NaOH\) in one liter of water is:

\(CH_3CH_2OH \xrightarrow[413\ K]{H_2SO_4}\) A. Identify "A" and mention the name of mechanism through which it is formed?

Formaldehyde undergoes the Cannizzaro reaction because:
(A) It has alpha-hydrogen atom.
(B) It does not have alpha-hydrogen atom.
(C) It does not undergo self-oxidation and reduction on heating with concentrated alkali.
(D) It undergoes self-oxidation and reduction on heating with concentrated alkali.
Choose the correct answer from the options given below :

If we plot graph for first order reaction involving reactant \(R\), then it will be a straight line if plotted for :

The solubility of a gas in a liquid

The differential equation representing the family of curves \(y=A x+\frac{B}{x}, x \neq 0\), where A and B are arbitrary constants, is given by

Which of the following statements are correct about energy flow?
(A) Net primary productivity is available to consumers.
(B) Secondary productivity increases with each trophic level.
(C) The growth of the food chain is limited by the inefficiency of energy transfer.
(D) About 90% energy at one trophic level does not appear at the next level.
Choose the correct answer from the options given below:

Mr. X invested Rs. 4, 00, 000 in shares for 5 years.
The value of this investment was Rs. \(4,50,000\) at the end of the second year, Rs. \(4,90,000\) at the end of the third year and on maturity, the final value stood at Rs. \(6,00,000\).
The compound annual growth rate (CAGR) of this investment is :
[Given that \((1.5)^{1 / 5}=1.084\) ]

The person with karyotype 44+XXY is suffering from:

The inverse of the matrix \(\left[\begin{array}{lll}4 & 0 & 0 \\ 0 & 5 & 0 \\ 0 & 0 & 6\end{array}\right]\) is

In the depletion region of an unbiased p-n junction diode there are