entry test preparation for medical and engineering

[kashibhayya]

A.A!
Dosto! F.sc k exams ho chuke hain aur bohut se dost medical ya engineering college main admission lene keliye entrance test ki preparation main masruf hain.isliye maine socha k kion na aik thread bana diya jaye,jahan mushkil mcqs par discussion ho sake. Aur har student is se faida bhi utha sake.
Note: sirf mcqs pucha karain.is thread main fazul comments dene se ijtinab karain taa k thread fazul main lamba hone se bache. Aur student kam se kam waqt main zyad knowledge gain karain.

[kashibhayya]

chalo main hi start leta hon.


1).Which element burn in air to form an oxide which when shaken with water,gives a solution with a PH greater than 7?
A). Carbon b).hydrogen
C).magnesium d).sulphur


2). Which element forms an oxide that reacts with water to give an acidic solution?
A). Aluminium b).sodium
C). Sulphur d). Zinc

[Help4everyone]

Ok

[kashibhayya]

The following elements are radioactive:
1). Francium
2). Radium
3). Lithium
4). Barium
5). Both 1 & 2
6). Both 3 & 4

[AbRahman77]

The following elements are radioactive:
1). Francium
2). Radium
3). Lithium
4). Barium
5). Both 1 & 2
6). Both 3 & 4

its 5

[kashibhayya]

The number of electrons in one columb charge is equal to.
1)6.2*10power18
2)1.6*10 pwr -19
3)zero
4)6.2*10 pwr 21

[AbRahman77]

The number of electrons in one columb charge is equal to.
1)6.2*10power18
2)1.6*10 pwr -19
3)zero
4)6.2*10 pwr 21

Its 2

[kashibhayya]

2 is wrong answer.

This question can be solved by this equation:
Q=ne
n=q/e
Now putting q=1 coulumb and e=1.6*10 raise to the power -19
n=1/1.6*10^ -19
n=6.2*10^18
So, 1 is the correct answer.

[AbRahman77]

2 is wrong answer.

This question can be solved by this equation:
Q=ne
n=q/e
Now putting q=1 coulumb and e=1.6*10 raise to the power -19
n=1/1.6*10^ -19
n=6.2*10^18
So, 1 is the correct answer.

oh yes thanks

[kashibhayya]

2nd ionization energy of alkali metals are ?
1). Less than that of alkaline earth metals
2). More than that of alkaline earth metals
3). Equal to that of alkaline earth metals
4). Don't have clear difference

[kashibhayya]

Find the distance travelled by a free fall body during 5th second. a.35. b.45. c.48. d.55

[kashibhayya]

Which is not transition element?
1). Zn
2). Cd
3).Hg
4). All of these