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Subject

Chemistry

Gujarati JEE Chemistry : રસાયણવિજ્ઞાનના પાયાના સિદ્વાંતો

Multiple Choice Questions

11. 0.050 માં રહેલા સાર્થક અંકોની સંખ્યા જણાવો.

12. તાપમાનના કયા મૂલ્ય માટે સેલ્સિયસ અને ફૅરનહિટ માપક્રમ બંને સરખું મૂલ્ય દર્શાવશે ?

13.

બે પ્રવાહી 'X' અને 'Y'ના ઉત્કલનબિંદુમાં 40 K નો તફાવત છે, તો તેમના ઉત્કલનબિંદુમાં કેટલા ફૅરનહિટનો તફાવત હશે ?

$104 degree space straight F$
$345 degree space straight F$
$72 degree space straight F$
$40 degree space straight F$

14.

0.6 m લંબાઇ, 10 m પહોળાઇ અને 150 mm ઉંડાઇ ધરાવતા પાત્રનું કદ લિટરમાં શોધો.

90 L
9 L
$bold 0 bold times bold 09 bold space bold L$
$bold 0 bold times bold 09 bold space bold L$

9 L

straight v space equals space 1 space cross times space straight b space cross times space straight h space space space space equals space 0.6 space straight m space space space cross times space 10 space cross times space 10 space cross times space 10 to the power of negative 2 end exponent straight m space cross times space 150 space cross times space 10 to the power of negative 3 end exponent space straight m space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space equals space 9 space cross times space 10 to the power of negative 3 end exponent space straight m cubed space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space equals space 9 space લ િ ટર space

straight v space equals space 1 space cross times space straight b space cross times space straight h space space space space equals space 0.6 space straight m space space space cross times space 10 space cross times space 10 space cross times space 10 to the power of negative 2 end exponent straight m space cross times space 150 space cross times space 10 to the power of negative 3 end exponent space straight m space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space equals space 9 space cross times space 10 to the power of negative 3 end exponent space straight m cubed space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space equals space 9 space લ િ ટર space

15. એક પદાર્થની ઘનતા $bold 12 bold times bold 6 bold space bold g bold divided by bold cm to the power of bold 3$ છે. આ પદાર્થની ઘનતા કિલોગ્રામ પ્રતિ લિટરમાં શોધો.

$12 times 6$
$1 times 26$
$12600$
$126000$

16.

10 A $degree$ = ........... nm.

$0 times 01$
100
1
$0 times 1$

17.

બે પ્રવાહીના ઉત્કલનબિંદુમાં $bold 18 bold space bold degree bold F$ નો તફાવત છે. જો એક પ્રવાહીનું ઉત્કલનબિંદુ $bold 111 bold space bold degree bold C$ હોય, તો બીજા પ્રવાહીનું ઉત્કલનબિંદુ શોધો.

$103 times 2 degree space straight C$
$101 degree space straight C$
$118 times 2 degree space straight C$
$93 degree space straight C$

18. $bold 10 to the power of bold 12 bold space bold μg$ બરાબર કેટલા Gg થશે ?

10³
10^-3
10³¹
10^-5

19. 0 $times$ 00506ને વૈજ્ઞાનિક નોટેશન પદ્વતિ અનુસાર કેવી રીતે દર્શાવાય ?

$bold 0 bold times bold 0506 bold space bold cross times bold space bold 10 to the power of bold minus bold 1 end exponent$
$bold 5 bold times bold 06 bold space bold cross times bold space bold 10 to the power of bold 3$
$bold 50 bold times bold 6 bold space bold cross times bold space bold 10 to the power of bold minus bold 4 end exponent$
$bold 5 bold times bold 06 bold space bold cross times bold space bold 10 to the power of bold minus bold 3 end exponent$

20. $bold 1 bold times bold 8 bold space bold cross times bold space bold 10 to the power of bold minus bold 2 end exponent bold space bold km$ ને સેન્ટિમીટરમાં ફેરવો.

180
18000
1800
180000

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