Odisha Board - Class 9

Physics & Chemistry question bank (Physical Science (ଭୌତିକ ବିଜ୍ଞାନ - ୯))

Practice 504 free Odisha Board - Class 9 Physical Science (ଭୌତିକ ବିଜ୍ଞାନ - ୯) - Physics & Chemistry questions with answers and step-by-step solutions.

Q1.

ଭୌତିକ ବିଜ୍ଞାନ (HSC Matric): ଆଲୋକର ପ୍ରତିଫଳନ ଓ ପ୍ରତିସରଣରେ 'ପଦାର୍ଥ ଓ ଏହାର ପରିବର୍ତ୍ତନ' ଦର୍ପଣ ସୂତ୍ର କ’ଣ?


(A)
$\frac{1}{v} + \frac{1}{u} = \frac{1}{f}$ (ପଦାର୍ଥ ଓ ଏହାର ପରିବର୍ତ୍ତନ)
(B)
$\frac{{1}}{{v}} - \frac{{1}}{{u}} = \frac{{1}}{{f}}$
(C)
$v + u = f$
(D)
$R = 2f$
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Q2.

ରାସାୟନିକ ପ୍ରତିକ୍ରିୟା ଓ ସମୀକରଣ: 'ପଦାର୍ଥ ଓ ଏହାର ପରିବର୍ତ୍ତନ' କେଉଁ ପ୍ରକାରର ରାସାୟନିକ ପ୍ରତିକ୍ରିୟା ଅଟେ?


(A)
ସଂଶ୍ଳେଷଣ, ବିଘଟନ, ବିସ୍ଥାପନ କିମ୍ବା ଦ୍ୱି-ବିସ୍ଥାପନ ପ୍ରତିକ୍ରିୟା (ପଦାର୍ଥ ଓ ଏହାର ପରିବର୍ତ୍ତନ)
(B)
କେବଳ ଭୌତିକ ପରିବର୍ତ୍ତନ
(C)
ଅପ୍ରତ୍ୟାବର୍ତ୍ତୀ କ୍ରିୟା
(D)
ଏଥିମଧ୍ୟରୁ କୌଣସିଟି ନୁହେଁ
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