Home
Class 11
PHYSICS
One of the domains of physics “ microsco...

One of the domains of physics “ microscopic" Deals with the phenomena at
I) atomic- level II) molecular- level III) nuclear -leve

A

Only I and III are correct

B

Only I and II are correct

C

Only II and III are correct

D

I, II, and III are correct

Text Solution

Verified by Experts

The correct Answer is:
D
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • PHYSICAL WORLD

    AAKASH SERIES|Exercise VERY SHORT ANSWER QUESTIONS|5 Videos

  • PHYSICAL WORLD

    AAKASH SERIES|Exercise EXERCISE|10 Videos

  • PHYSICAL WORLD

    AAKASH SERIES|Exercise LECTURE SHEET (EXERCISE - I (MATRIX MATCHING TYPE QUESTIONS))|1 Videos

  • OSCILLATIONS

    AAKASH SERIES|Exercise PRACTICE EXERCISE - SPRINGS|16 Videos

  • RAY OPTICS

    AAKASH SERIES|Exercise EXERCISE III|64 Videos

Similar Questions

Explore conceptually related problems

How are colloids classified on the basis of (i) physical states of components (ii) nature of dispersion medium and (iii) interaction between dispersed phase and dispersion medium ?

A chemical equation is always balanced with respect which one of the following i) Number of atoms ii) Number of molecules iii) Number of moles iv) Mass

Knowledge Check

  • Match the following list of animals with their level of organisation . {:((a),Organ" level ",(i),Pheretima),((b),"Cellular aggregate level",(ii),"Fasciola"),((c ),"Tissue level",(iii),"Spongilla"),((d),"Organ system level",(iv),"Obelia"):}

    A
    `{:((i)(ii)(iii)(iv)),((b)(c )(d)(a)):}`
    B
    `{:((i)(ii)(iii)(iv)),((b)(d )(c)(a)):}`
    C
    `{:((i)(ii)(iii)(iv)),((d)(a )(b)(c)):}`
    D
    `{:((i)(ii)(iii)(iv)),((a)(d )(c)(b)):}`

  • (A): Atomic energy level spacings are of the order of ev, while the difference in nuclear energy levels is of the order of Mev (R) : Any nucular reaction obeys all conservation laws.

    A
    Both .A. and .R. are true and .R. is the correct explanation of .A.
    B
    Both .A. and .R. are true and .R. is not the correct explanation of .A.
    C
    A. is true and .R. is false
    D
    A. is false and .R. is false

  • Study the following I)The blood level of thyroid hormones is high II)Thyroid hormones level in the bloos is zero III)The bloos level of TSh is high IV)The blood level of TRH is high Which that has undergone thyroidectomy

    A
    II,IV and VI
    B
    I,III and V
    C
    I,IV and VI
    D
    II,III and V

    • Similar Questions

    Explore conceptually related problems

    Screening effect is the effect produced by intervening electron between nucleus and valence electrons. They shield the nucleus from valence electron and effective nuclear charge decreases if there is less shielding effect, the effective nuclear charge decreases. Balance electrons are attracted by nucleus and repelled by other electrons. Net attractive force on electron under consideration =Z- sigma = (Nuclear charge screening effect) which is Slater's formula for screening constant. If one electron is present in outermost orbit, there will be no screening in that orbital. Each electron contributes 0.35 (total electrons minus 1) present in outermost shell. In penultimate energy level, electrons contribute 0.85. A contribution of 1.0 is from remaining electrons (present in last but one energy level). The effective nuclear charge for 4s electrons of Zn will be

    The electrons in atoms occupy atomic orbitals (AO_(s)) that are represented as theregions around the nuclei where there is a high probability of finding the electrons. ln the so-called LCAO (linear combitaks) approach, as pioneered by Hund and Mulliken, when AOs come close together, they overlap forming MOs (molecular orbitals). Two AO s can overlap to form two MOs, one of which lies at a lower energy level (BMO) than the other at a higher energy level and is called an antibonding molecular orbital (ABMO). Each MO can hold one or two electrons in accordance with Pauli's exclusion principle. MOT can explain the paramagnetism of molecules such as O_(2) and NO and other spectral features. In a molecule number of electrons in bonding MO is more as compared to antibonding MO, hence

    The electrons in atoms occupy atomic orbitals (AO_(s)) that are represented as theregions around the nuclei where there is a high probability of finding the electrons. ln the so-called LCAO (linear combitaks) approach, as pioneered by Hund and Mulliken, when AOs come close together, they overlap forming MOs (molecular orbitals). Two AO s can overlap to form two MOs, one of which lies at a lower energy level (BMO) than the other at a higher energy level and is called an antibonding molecular orbital (ABMO). Each MO can hold one or two electrons in accordance with Pauli's exclusion principle. MOT can explain the paramagnetism of molecules such as O_(2) and NO and other spectral features. Bond strength increases with

    Match the following terms in Column-I with their descriptions by writing the appropriate letters from Column-II. Column-I A) A molecule used to carry foreign B) A rapid way to amplify DNA C) A way to separate DNA fragments D) Molecular scissors E) A gene sequence from more than one origin Column - II I) Restriction enzymes genes into bacteria II) Recombinant DNA in the laboratory III) PCR based on their size IV) Vector V) Gel electrophoresis

    When we concept that one mole of a substance contains the same numbers of elementary entities or one mole of any other substance, we don’t actually need to know what that number is. Sometimes however we will need to work with the actual number of elementary entities in a mole of substance. This number is called Avogadro.s number. N_(A)=6.022137xx10^(23) molecules The unit mol^(-1) which we read as per mole signifies that a collection of N_(A) molecular level entities is equivalent to one mole at the macroscopic level. For example a mole of carbon contains 6.02xx10^(23) atoms of C. A mole of oxygen gas contains 6.02xx10^(23) molecules of O_(2) . The dot at the end of a sentence has a mass of about one micrograms. Assuming that the black stuff is carbon. No. of carbon atoms present in it is

    Home
    Profile