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this is test question- find the value of x

this is test question find the value of x+2= 1

testing

Why we study iota?

what is the difference between the two ?

Which is the National Aquatic Animal of India?

Option: 1

Gangetic shark


Option: 2

River dolphin


Option: 3

Blue whale


Option: 4

Sea - horse


Which cells of 'Crypts of Lieberkuhn' secrete antibacterial lysozyme?

Option: 1

Argentaffin cells


Option: 2

Paneth cells


Option: 3

Zymogen cells


Option: 4

Kupffer cells


Match Column-I with Column-II and select the correct option using the codes given below

     a                   b            c                  d

Option: 1

i                       ii                      iv              iii


Option: 2

iii                 i         iv             ii


Option: 3

iv            iii            i                    ii


Option: 4

ii               i              iv                    iii


Four successive members of the first series of the transition metals are listed below. For which one of the standard potential \left( {\text{E}_{\text{M}^{2 + } /\text{M}}^\text{o} } \right) value has a positive sign?

Option: 1

Ni (Z = 28)


Option: 2

Cu (Z = 29)


Option: 3

Fe (Z = 26)


Option: 4

Co (Z = 27)


Which of the following cannot be detected in a developing foetus by amniocentesis?

Option: 1

Jaundice


Option: 2

Klinefelter syndrome


Option: 3

Sex of the foetus


Option: 4

Down syndrome


A body of mass 'm' is taken from the earth's surface to the height equal to twice the radius (R) of the earth. The change in potential energy of body will be:

Option: 1

\frac{1}{3}\text{mgR}


Option: 2

mg 2R


Option: 3

\frac{2}{3}\text{mgR}


Option: 4

3 mgR


Which one of the following is wrong about chara?

Option: 1

Upper oogonium and lower round antheridium


Option: 2

Globule and nucule present on the same plant


Option: 3

Upper antheridium and lower oogonium


Option: 4

Globule is male reproductive structure


Chromatophores take part in :

Option: 1

Growth


Option: 2

Movement


Option: 3

Respiration


Option: 4

Photosynthesis


Synapsis occurs between:

Option: 1

mRNA and ribosomes


Option: 2

spindle fibres and centromere


Option: 3

two homologous chromosomes


Option: 4

a male and a female gamete


Copper crystallises in a face-centred cubic lattice with a unit cell length of 361 pm. What is the radius of copper atom in pm?

Option: 1

157


Option: 2

181


Option: 3

108


Option: 4

128


The ionization constant of ammonium hydroxide is 1.77 \times 10^{-5} at 298 K. Hydrolysis constant of ammonium chloride is:

Option: 1

6.50 \times 10^{-12}


Option: 2

5.65 \times 10^{-13}


Option: 3

5.65 \times 10^{-12}


Option: 4

5.65 \times 10^{-10}


From the following bond energies:

H - H bond energy: 431.37 kJ mol-1

C = C bond energy: 606.10 kJ mol-1

C - C bond energy: 336.49 kJ mol-1

C - H bond energy: 410.50 kJ mol-1

Enthalpy for the reaction,

will be:

Option: 1

-243.6 kJ mol-1


Option: 2

-120.0 kJ mol- 1


Option: 3

553.0 kJ mol-1


Option: 4

1523.6 kJ mol- 1


Reduction in vascular tissue, mechanical tissue and cuticle is characteristic of

Option: 1

mesophytes


Option: 2

epiphytes


Option: 3

hydrophytes


Option: 4

xerophytes


Read the following four statements, A, B, C and D and select the right option having both correct statements.

STATEMENTS:

(A) Z- scheme of light reaction takes place in presence of PS I only.

(B) Only PS I is functional in cyclic photophosphorylation.

(C) Cyclic photophosphorylation results into synthesis of ATP and NADPH2

(D) Stroma lamellae lack PS II as well as NADP.

Option: 1

B and D


Option: 2

A and B


Option: 3

B and C


Option: 4

C and D


The lac operon consists of

Option: 1

Four regulatory genes only


Option: 2

One regulatory gene and three structural genes


Option: 3

Two regulatory genes and two structural genes


Option: 4

Three regulatory genes and three structural genes


If cp and cv denote the specific heats (per unit mass) of an ideal gas of molecular weight M, then  (where R is the molar gas constant)

Option: 1

cp-cv=R/M2


Option: 2

cp-cv=R


Option: 3

cp-cv=R/M


Option: 4

cp-cv=MR

 


Two positive ions, each carrying a charge q, are separated by a distance d. If F is the force of repulsion between the ions, the number of electrons missing from each ion will be (e being the charge on an electron)

Option: 1

\frac{4\pi\varepsilon_{0}\text{Fd}^{2}}{\text{q}^{2}}


Option: 2

\frac{4\pi\varepsilon_{0}\text{Fd}^{2}}{\text{e}^{2}}


Option: 3

\sqrt{\frac{4\pi\varepsilon_{0}\text{Fe}^{2}}{\text{d}^{2}}}


Option: 4

\sqrt{\frac{4\pi\varepsilon_{0}\text{Fd}^{2}}{\text{e}^{2}}}


The correct order of the decreasing ionic radii among the following isoelectronic species is :

Option: 1

K+ > Ca2+ > Cl- > S2-


Option: 2

Ca2+ > K+ > S2- > Cl-


Option: 3

Cl- > S2- > Ca2+ > K+


Option: 4

S2- > Cl- > K+ > Ca2+


Sweet potato is homologous to

Option: 1

Ginger


Option: 2

Turnip


Option: 3

Potato


Option: 4

Colocasia


Pure Si at 500 K has equal number of electron (ne) and hole (nh) concentrations of 1.5 x 1016 m-3. Doping by Indium increases nh to 4.5 x 1022 m-3.

The doped semiconductor is of:

Option: 1

n-type with electron concentration ne = 2.5 x 1023 m-3


Option: 2

p-type having electron concentration ne = 5 x 109 m-3


Option: 3

n-type with electron concentration ne = 2.5 x 1022 m-3


Option: 4

p-type with electron concentration ne = 2.5 x 1010 m-3


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