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1.

What is the full form of IVF ?

Answer» In Vitro- Fertilisation.
2.

Doppler effect is not applicableA. source and observer are at restB. there is a relative motion between source and observerC. both are moving in opposite directionsD. both are moving same dircetion with different velocities

Answer» Correct Answer - A::B::C::D
3.

A small body of maas 0.3 kg ascillates in vertical plane with the help of a string 0.5 m long with a constant speed of 2 m/s. It makes an angle of `60^(@)` with the vertical. Calculate tension in the string `(g=9.8m/s^(2))`.

Answer» Given m=0.3 kg, r=l=0.5m, v=2 m/s and `theta=60^@)`
`:.` Tension in the string `=(mv^(2))/(r)+mgcostheta`
`=(0.3xx4)/(0.5)+0.3xx9.8xxcos60^(@)`
`=2.4+1.47`
`=3.87N`.
4.

If the Earth losses its gravity, then for a bodyA. both mass and weight become zeroB. neither mass nor weight become zeroC. weiht become zero but not the massD. mass becomes zero but not the weight

Answer» Correct Answer - A::B::C
5.

If the angular speed of the Earth is `7.26xx10^(-5)` rad/s and radius of the Earth is 6,400 km, calculate the change in weight of 1 kg of mass taken from equator to pole.

Answer» Given, angular speed of Earth `(omega)=7.26xx10^(-5)` rad/s
radius of earth (R) `=6400km=6.4xx10^(6)m`
mass of body (m)=1 kg
At poles, `phi=90^(@)`
`:.cos90^(@)=0`
Now,
Change in weight `(DeltaW)=mDeltag`
`=m(Romega^(2))`
`=1xx6.4xx10^(6)xx(7.26xx10^(-5))^(2)`
`=3.373xx10^(-2)N
6.

Calcium carbonate used in the extraction of iron acts as :A. oxidising agentB. reducing agentC. gangueD. flux

Answer» Correct Answer - D
7.

The number of adenine molecules in a given DNA segment is 25 and the number of cytosine molecules is 45, the total number of nucleotides in the segment is ____A. 70B. 140C. 90D. 50

Answer» Correct Answer - B
8.

An ionic crystal lattice hase limting value3 of radius ratio as `0*414 to 0*732` , the co-ordination number of its cation is :A. 6B. 4C. 3D. 12

Answer» Correct Answer - A
9.

Infectious stage of Plasmodium isA. TropozoiteB. SporozoiteC. CrytozoiteD. Metacercaria

Answer» Correct Answer - B
10.

The unit of rate constant for zero order reaction is :A. `t^(-1)`B. `"mol dm"^(-3) t^(-1)`C. `"mol"^(-1) "dm"^(3) t^(-1)`D. `"mol" ^(-2) "dm^(6) t^(-1)`

Answer» Correct Answer - B
11.

Myopia is an example of____A. Complete sex-linkageB. incomplete sex-linkageC. recombinationD. crossing over

Answer» Correct Answer - A
12.

The process of formation of partially decomposed organic matter is called _____A. fragmentionB. leachingC. catabonlismD. humification

Answer» Correct Answer - D
13.

Overproduction is the principle ofA. LamarckismB. Theory of organic evolutionC. Panspermia theoryD. Modern theory of evolution

Answer» Correct Answer - B
14.

उचित प्रत्यय लगाकर निम्नलिखित में से किसी एक शब्द का विशेषण रूप लिखिए रसायन

Answer» Correct Answer - रासायनिक
15.

उचित प्रत्यय लगाकर निम्नलिखित में से किसी एक शब्द का विशेषण रूप लिखिए धर्म

Answer» Correct Answer - सच्चाई
16.

उचित प्रत्यय लगाकर निम्नलिखित में से किसी एक शब्द का भाववाचक संज्ञा रूप लिखिए निष्ठुर

Answer» Correct Answer - निष्ठुरता
17.

उचित प्रत्यय लगाकर निम्नलिखित में से किसी एक शब्द का भाववाचक संज्ञा रूप लिखिए सच

Answer» Correct Answer - धार्मिक
18.

शनि सौर मंडल का ……………… बड़ा ग्रह है।A. पहलाB. दूसराC. तीसराD. इनमे से कोई नहीं

Answer» Correct Answer - दूसरा
19.

Write the mathmatical expression of the First Law of Thermodynamics for the following processes : (1) Isothermal `" "` (2) Adiabatic (3) Isochoric `" "` (4) Isobaric

Answer» Mathematical expression of 1st law of thermodynamics for :
(1) Isothermal process : `Delta u=q+W`
`:. Delta u=0`
`W=-q`
(2) Adiabatic process :
`Delta u=q+W`
`:. q=0`
`Delta y=-W`
(3) Isochoric process :
`Delta u=q+W`
`:. W=-p_(ex)Delta v`
`Delta u=q-p_(ex) Delta v`
(4) Isobaric process :
`Delta u=q_(p)=p_(ex)Deltav`
20.

Describe the T.S. of human testic and explain the process of spermatogenesis.

Answer» Histological structure of testis :
(a) The external covering of testis is a fibrous connective tissue called tunica albuginea.
(b) Then there is an incomplete pertioneal covering called tunica vaginalis.
© Interior to this there is a covering called tunica vascularis formed by capillaries.
(d) The testis si composed of many seminiferous tubules that are lined by cuboidal germinal epithelial cells.
(e) In the seminiferous tubulas various stages of developing sperms are seen as spermatogenesis takes place here. These are spermatogonia, primary and secondary spermatocytes, spermateds and sperms.
(f) Interrupted between germinal eptihelium are large pyramidal subtentacular cells, nurse cells or sertoli cells provide nourishment to the sperms till maturation.
(g) In between the seminiferous tubules there are itnerstitial cells of leyding which are endorine in nature. They secrete testosterone.
Spermatogenesis : The process by which sperms are formed is called spermatogenesis.
(a) In the testis, i.e, male gonads there are seminferous tubules which are lined by germinal epithelium.
(b) Cells of germinal epithelium undergo spermatogenesis and form sperms.
(c ) In between the germinal cells there are nurse cells or cells of sertoli which provide nourishment to teh develping sperms.
21.

Find out the words from the extract which mean : companies controlled by another

Answer» Correct Answer - Subsidiaries.
22.

Find out the words from the extract which mean : drranging in order,

Answer» Correct Answer - Assembling.
23.

Write the names and chemical formulae of any two minerals of aluminium.

Answer» Two minerals of aluminiu, are :
(a) Bauxite `-Al_(2)O_(3).2H_(2)O`
(b) Cryolite -`NaAIF_(6)`
24.

"बिगरी बात बनै नहीं, लाख करों किन कोय। रहिमन फाटे दूध को, मथे न माखन होय किसका माखन नहीं होता हैं

Answer» फटे दूध का माखन नहीं होता है
25.

निम्नलिखित विकल्पों में से सही विकल्प चुनकर पंक्ति फिर से लिखिए प्रभु जी तुम ………………….. हम पानीA. चंदनB. सुगंधC. दीपD. इनमे से कोई नहीं

Answer» Correct Answer - चंदन
26.

"बिगरी बात बनै नहीं, लाख करों किन कोय। रहिमन फाटे दूध को, मथे न माखन होय लाख कोशिश करने पर भी किस सुधारा जा सकता है

Answer» लाख कोशिश करने पर भी विगड़ी हुई बात को सुधारा नहीं जा सकता
27.

सीमेन्ट और कंक्रीट में मेरा गाँव कहां खो गया बुलडोजर की खड़खड़ाहट में चिर निद्टा सो गया, मन की क्यारियों में, यादों में बो गया, आँखों से हो ओझल, दे गया एक हरा घाव बहुत याद आता है ……….. कवयित्री का गाँव कहाँ खो गया हैं

Answer» कवयित्री का गाँव सीमेंट और कंक्रीट में यानी शहरीकरण में खो गया है
28.

सीमेन्ट और कंक्रीट में मेरा गाँव कहां खो गया बुलडोजर की खड़खड़ाहट में चिर निद्टा सो गया, मन की क्यारियों में, यादों में बो गया, आँखों से हो ओझल, दे गया एक हरा घाव बहुत याद आता है ……….. आँखों से ओझल क्या हो गया

Answer» कवयित्री का पुराना गाँव उसकी आँखों से ओझल हो गया और उनके मन को गहरा घाव देकर उसकी यादों में बस गया
29.

सीमेन्ट और कंक्रीट में मेरा गाँव कहां खो गया बुलडोजर की खड़खड़ाहट में चिर निद्टा सो गया, मन की क्यारियों में, यादों में बो गया, आँखों से हो ओझल, दे गया एक हरा घाव बहुत याद आता है ……….. किसकी खड़खड़ाहट में गाँव सो गया

Answer» बुलडोजर की खड़खड़ाहट में गाँव सोया है
30.

निम्नलिखित वाक्यों में से किन्हीं दो वाक्यों के रचना के अनुसार भेद पहचानकर लिखिए : अंधेरा होते ही वह मेरे पलंग के पास आ बैठती और फिर सबेरा होने पर ही बाहर निकलती

Answer» Correct Answer - संयुक्त वाक्य
31.

निम्नलिखित वाक्यों में से किन्हीं दो वाक्यों के रचना के अनुसार भेद पहचानकर लिखिए : जैसी निश्चिंतता और वेफिक्री की जरूरत होती है, वह तो उनसे कोरसों दूर थी

Answer» Correct Answer - मिश्र वाक्य
32.

निम्नलिखित वाक्यों में से किन्हीं दो वाक्यों के रचना के अनुसार भेद पहचानकर लिखिए : सरकार ने स्थान-स्थान पर प्रौढ़ शिक्षा केंद्र खोल दिए हैं

Answer» Correct Answer - सरल वाक्य
33.

निम्नलिखित विकल्पों में से सही विकल्प चुनकर पंक्ति फिर से लिखिए सुनौ मैंने वह नहीं जो थी सुनी …………………A. पुकारB. झंकारC. हुंकारD. इनमे से कोई नहीं

Answer» Correct Answer - झंकार
34.

Classify the following solids into different types (a) Ammonium phosphate (b) Brass (c) `S_(8)` molecule (d) Diamond

Answer» (a) Ammonium phosphate - Ionic solid
(b) Brass- Metallic solid ltbr (c) `S_(8)` Molecule solid
(d) Diamond- Covalent soldi
35.

Classify the chromosomes on the basis of position of centromere.

Answer» (i) Types of chromosomes :
(a) Metacentric : Centromere is situated in the middle of the chromosome.
(b) sub - metacentic : Centromere is situted some distance away from the middle .
© Aerocentric: Centromere is situated at the tip of the chromosome.
(d) Telocentric : Centromere is situated at the tip of the chromosome.
36.

In series LCR circuit, the phase angle between supply voltage and current isA. `pirad`B. `(pi)/(2)rad`C. `(pi)/(4)radD. zero rad

Answer» Correct Answer - A::D
37.

The small error in Meter Bridge experiment due to end resistance will be eliminated by ______A. by connecting both the resistance only in one gap.B. by interchanging the positions of known and unknown resistances.C. by using uniform wireD. by obtaining the null point near the ends of the

Answer» Correct Answer - A::B::C::D
38.

Discuss different modes of vibrations in an air column of a pipe open at both the ends. State the cause of end correction. Find the end correction for the pipe open at both the ends in fundamental mode. What should be tension applied to a wire of length 1m and maas 10 g, if it has to vibrate with fundamental frequency of 50 Hz?

Answer» Modes of vibration of air column in a pipe open at both ends : An open argan pipe is a cylindricla tube containing an air column open at both ends. A vibrating tuning fork is held horizontally near end of the pipe. Sound waves are sent by source (vibrating tuning fork) near one end. Refer to HSC paper, July 2018, Answer 4(i).
Cause of End correction : End correction arises because air particles in the plane of the open end of tube, are not free to move in all directions. Hence, reflection takes place at the plane, at small distance outside the tube.
End correction for the pipe open at both ends :
`v=2n_(1)L_(1)=2n_(2)L_(2)`
`n_(1)L_(1)=n_(2)L_(2)`
`n_(1)(l_(1)+2e)=n_(2)(l_(2)+2e)`
`e=(n_(1)l_(1)-n_(2)l_(2))/(2(n_(2)-n_(1)))`
or `=((n_(2)l_(2)-n_(1)l_(1)))/(2(n_(1)-n_(2)))`
Numerical :
We have, `l=1m,M=10g=10xx10^(-3)kg,n=50Hz`
Linear density of wire (m) `=(M)/(l)=(10xx10^(-3))/(1)`
`=10xx10^(-3)kgm^(-1)`.
`impliesn=(1)/(2)lsqrt((T)/(m))`
`implies50=(1)/(2)xx1xxsqrt((T)/(10xx10^(-3)))`
`implies(100)^(2)=(T)/(10xx10^(-3))`
`impliesT=100N`.
`:.` Tension to be applied to the wire is 100 N.
39.

(A) Read the following extract and answer the questions given below : Old women once were continents. They had deep woods in them, lakes, mountains, volcanoes even, even raging gulf. When the earth was in heat They melted, shrank. leaving only their maps. You can fold them and keep them handy: who knows, they might help you find your way home. According to you, what kind of help should we provide to old people

Answer» Old people need medical care and concern. They are like children who need a lot of love and affection from their loved ones. They should be given not just physical help but also immense emotional support
40.

(A) Read the following extract and answer the questions given below : Old women once were continents. They had deep woods in them, lakes, mountains, volcanoes even, even raging gulf. When the earth was in heat They melted, shrank. leaving only their maps. You can fold them and keep them handy: who knows, they might help you find your way home. Name and explain the figure of speech in the following lines : Old women once were continents

Answer» Metaphor -Implied comparison between continents and old women.
41.

Write on any ONE of the following items Best time (season ) of the year to visit

Answer» Rampur
Location : Rampur is situated on the bank of Saraswati river. It is a village located in Junagarh district.
Best time (season) of the year to visit : October to January is the best time of the year to visit, because weather during this time is soothing. Nature is full of lush green. One can enjoy the winter here. Carnival organised during this time and fair of Mother Merry are the special attractions for family.
42.

Write on any ONE of the following items Accommodation.

Answer» Rampur
Location : Rampur is situated on the bank of Saraswati river. It is a village located in Junagarh district.
Accommodation : It is not a problem in Rampur. AC and Non-AC rooms are available at an affordable rate. State tourism department has also made an arrangement for it.
43.

Write on any ONE of the following items How to get there

Answer» Rampur
Location : Rampur is situated on the bank of Saraswati river. It is a village located in Junagarh district.
How to get there : Rampur is a connected pplce. You can travel by an S.T bus as well as by railway also. One can go by private vehicle also. Journey to Rampur is enjoyable, nature and hills on both sides of the road are a treat for city dwellers.
44.

The secondary structure of proteins is derived fromA. co-ordinate bondB. ionic bondC. hydrogen bondD. cavalent bond

Answer» Correct Answer - hydrogen bond
45.

Define enzymes. How is peptide linkage formed ?

Answer» Enzymes are the biocatalysts for a bichemical reactio in the living organisms. Example maltos is convered into glucose in the presence of an enzyme maltose.
`underset("Maltose")(C_(12)H_(22)OH)overset("Maltose") rarr underset("Glucose")(C_(6)H_(12)O_(6))`
46.

Phenol when nitrated with conc. `HNO_(3)` in presence of conc. `H_(2)SO_(4)` formsA. o-nitrophenolB. p-nitrophenolC. 2,4,6-trinitrophenolD. m-nitrophenol

Answer» 2,4,6-trinitrophenol
47.

What is the action of concentrated sulphuric acid on the following (a) phosphorous pentachoride (b) copper (c) potassim chlorate

Answer» (a) `H_(2)SO_(4)+2PCI_(5) to SO_(2)CI_(2)+2POCI_(3)+2HCI`
(b) `Cu+2H_(2)SO_(4) to CuSO_(4) +SO_(2)+2H_(2)`
(c) `2KCIO_(3)+3H_(2)SO_(4) to 3KHSO_(4)+HCIO+2CIO_(2)+H_(2)O`
48.

Write the cell representation and calculate equilibrium constant for the following redox reaction : `Ni_((s))+2Ag_((aq))^(+)(1M) to Ni_((aq))^(2+)(1M) to 2Ag_((s)) at 25^(@)C` `E_(Ni)^_(Ni)^(2+)(@)=0*25V and E_(Ag)(+)^(@)=0*799V`

Answer» `Ni_((1M))^(2+)//Ni||Ag^(+)(1M)||Ag`
`E_("cell")^(@)=(0*0592)/(n)log_(10)K`
`E_("Cell")^(@)=E_(Ag)^(@)-E_(Ni)^(@)`
`=0*799(V)-(-0*25)=1*049V`
`:. =1*048=(0*0592)/(2)log_(10)K`
`1*049=(0*0592)/(2)log_(10)K`
`log_(10)K=(1*049xx2)/(0*0592)`
`=35*44`
`K="antilog"=35*4=2*754xx10^(23)`
49.

Calculate the standard enthalpy or comustion of `CH_(3)COOH_((l))` from the following data : `Delta_(f)H^(@)(CO_(2))=-39383 KJ "mol"^(-1)` `Delta_(f)H^(@)(H_2O)=-285*8 KJ "mol"^(-1)` `Delta_(f)H^(@) (CH_(3)COOH)=-483*KJ"mol"^(-1)`

Answer» `CH_(3)COOH+2O_(2) to 2CO_(2)+2H_(2)O Delta H_(2)= ?`
`2(Delta H_(f)CO_(2))+2(Delta _(f)H_(2)O)-Delta _(f)HCH_(3)COOH=Delta H_(e)`
`=2xx393.KJ//"mol"+2xx-285*8 KJ//"mol"-(-483*2KJ//"mol")`
`=-786*6-577*6+48*3`
`=-875*0 kJ//"mol"`
50.

Which of the following ion is coloured ?A. `Sc^(3+)`B. `Zn^(3+)`C. `Ti^(4+)`D. `V^(2+)`

Answer» Correct Answer - `V^(2+)`