The excessive exposure of humans to ultraviolet rays results in :(i) damage to immune system (ii) damage to lungs (iii) skin cancer (iv) peptic ulcers(a) (i) and (ii) (b) (ii) and (iv) (c) (i) and (iii) (d) (iii) and (iv)

Academic Biology NCERT Class 10

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Updated on: 18-Jan-2023

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Consider the list of terms given below:$(i)$. Tsunami $(ii)$. Landslides$(iii)$. Floods $(iv)$. LightningEarthquakes can cause$(a)$. $(i)$, $(ii)$ and $(iii)$ $(b)$. $(ii)$ and $(iv)$ $(c)$. $(ii)$, $(iii)$ and $(iv)$ $(d)$. $(iii)$ and $(iv)$
Which of the following are compounds?(i) CO (ii) No(iii) NO (iv) Co(a) (i) and (ii)(b) (ii) and (iii)(c) (i) and (iii)(d) (ii) and (iv)
Identify the unsaturated compounds from the followingPropanePropenePropyneChloropropane(a) (i) and (ii) (b) (ii) and (iv)(c) (iii) and (iv) (d) (ii) and (iii)
A list of mediums is given below$(i)$. Wood $(ii)$. Water$(iii)$. Air $(iv)$. VacuumIn which of these mediums can sound travel?$(a)$. $(i)$. and $(ii)$$(b)$. $(i)$., $(ii)$. and $(iii)$$(c)$. $(iii)$. and $(iv)$$(d)$. $(ii)$., $(iii)$. and $(iv)$
Which of the following are also considered to be the states of matter?(i) Plasma (ii) Platelets(iii) BEC (iv) BHC(a) (i) and (ii)(b) (ii) and (iii)(c) (i) and (iii)(d) (ii) and (iv)
Which of the following are homogeneous in nature?icewoodsoilair(a) (i) and (iii)(b) (ii) and (iv)(c) (i) and (iv) (d) (iii) and (iv)
Dalton’s atomic theory successfully explainedLaw of conservation of massLaw of constant compositionLaw of radioactivityLaw of multiple proportion(a) (i), (ii) and (iii)(b) (i), (iii) and (iv)(c) (ii), (iii) and (iv)(d) (i), (ii) and (iv)
The heteroatoms present in CH3 — CH2 — O — CH2— CH2Cl areoxygencarbonhydrogenchlorine(a) (i) and (ii)(b) (ii) and (iii)(c) (iii) and (iv)(d) (i) and (iv)
Which muscles act involuntarily?Striated musclesSmooth musclesCardiac musclesSkeletal muscles(a) (i) and (ii)(b) (ii) and (iii)(c) (iii) and (iv)(d) (i) and (iv)
Which of the following are not ionic compounds?KClHClCCl4NaCl(a) (i) and (ii)(b) (ii) and (iii)(c) (iii) and (iv)(d) (i) and (iii)
Which of the following process/processes release heat?(i) condensation (ii) vaporisation(iii) freezing (iv) melting(a) only (i)(b) only (iv)(c) (i) and (iii)(d) (ii) and (iv)
The hetero atoms present in: CH3 – CH2 – O – CH2 – CH2Cl are:oxygencarbonhydrogenchlorine(a) (i) and (ii)(b) (ii) and (iii)(c) (iii) and (iv)(d) (i) and (iv)
Which of the following are the correct characteristics of isotopes of an element?(i) same atomic mass(ii) same atomic number(iii) same physical properties(iv) same chemical properties(a) (i), (ii) and (iv)(b) (ii), (iii) and (iv)(c) (ii) and (iii)(d) (ii) and (iv)
Which of the following are physical changes?Melting of iron metalRusting of ironBending of an iron rodDrawing a wire of iron metal(a) (i), (ii) and (iii)(b) (i), (ii) and (iv)(c) (i), (iii) and (iv) (d) (ii), (iii) and (iv)

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