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In intrinsic semiconductors, conductivity is mainly due to breakage of covalent bonds in extrinsic semiconductors, the conductivity is due to the addition of impurities.

Sodium phenoxide is resonance stabilized hence phenol is most easily soluble in aqueous alkali.

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For a multi electron system, the energy of orbitals increase with increase in (n + l) value.

For same n + l value, the orbital with higher value of n has higher energy.

On repetitive use of NAND GATE or NOR gate, any logic GATE can be prepared.

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Unit of temperature is Fahrenheit

Unit of mass is atomic mass of unit

Unit of length is light year

Unit of time is shake

So₂ is the component of classical smog.

In a measurement, a choice of change of different units does not change the number of significant figures.

HF molecules are associated with strong intermolecular hydrogen bonding hence its boiling point is the highest

s – block and p – block elements together are called as representative elements.

Zn (Z = 30) is a d-block element.

Frequency in the stretched wire is

$f=\frac{1}{2l}\sqrt[]{\frac{T}{\mu }}$

$f_1^2=\frac{T_1}{4\mu l^2}$

$f_2^2=\frac{T_2}{4\mu l^2}$

$\frac{T_1+T_2}{4\mu l^2}=f^2$

$f^2=f_1^2+f_1^2$

$f=\sqrt[]{{\left(80\right)}^2+{\left(150\right)}^2}=170Hz$

$Be{\left(OH\right)}_2$ is amphoteric in nature

$Be{\left(OH\right)}_2+2O{H}^{-}\to {\left. [Be{\left(OH\right)}_4\right]}^{2-}$

Generally, $?iH$ decreases down the group but Pb has higher $?iH$  than Sn due to poor shielding effect of intervening d and f orbitals.

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Given beat frequency

$\left|X-95\right|=5$

$and\left|3X-290\right|=10$

$?X=100Hz$

^{$Mn{O}_2\stackrel{fusedwithKOHoxidisedwithairorKN{O}_3}{\to }Mn{O}_4^{2-}$}

The FRI Entrance Exam covers a wide range of topics in forestry, environmental science, and natural resource management. The following are some of the types of questions that are typically asked in the exam.

Multiple choice questions are the most common type of question asked in the FRI Entrance Exam. These questions test the candidate's knowledge of the basic concepts and principles of forestry, environmental science, and natural resource management.

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